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EnglishMOBILITY -> Wheels and tires for your BMW 4 Series 2020-2025
Wheels and tires
MOBILITY
Wheels and tires
at ambient temperature. The tire inflation pres-
sure specifications apply to the tire sizes ap-
proved by the vehicle manufacturer for the cor-
responding vehicle types.
Vehicle features and options
This chapter describes model-specific equip-
ment, systems, and functions that are currently
available, or may become available in the fu-
ture, even if they are not present in the vehicle.
To identify the correct tire inflation pressure,
please note the following:
▷
▷
Tire sizes of the vehicle.
Additional information:
Maximum speed for driving.
Vehicle equipment, refer to page 8.
On the control display
Tire pressure
The current tire inflation pressure values and
the intended tire inflation pressure values for
the mounted tires can be displayed on the con-
trol display.
General information
The tire condition and tire pressure influence
the following:
To ensure that they are displayed correctly, the
tire sizes must be stored in the system and
must have been set for the mounted tires.
▷
▷
▷
▷
The service life of the tires.
Driving safety.
The current tire inflation pressure value is lo-
cated on each tire.
Driving comfort.
Fuel consumption.
The reference tire inflation pressure value is
located in the lower area of the control display.
Safety information
Checking the tire pressure
Warning
General information
The tires heat up while driving. The tire pres-
sure increases with the tire temperature.
A tire with too little or no tire inflation pres-
sure may heat up significantly and sustain
damage. This will have a negative impact
on aspects of handling such as steering and
braking response. There is a risk of accident,
injury, or property damage. Regularly check
the tire inflation pressure, and correct it as
needed, for instance twice a month and be-
fore a long trip.
Tires have a natural, consistent tire pressure
loss.
The displays of inflation devices may under-
read by up to 0.1 bar/2 psi.
Checking via tire inflation pressure
specifications in tire pressure table
1. Determine the intended tire inflation pres-
sure levels for the mounted tires.
Tire pressure specifications
2. Check the tire inflation pressure in all four
tires, using a pressure gage, for example.
In the tire pressure table
The tire pressure table contains all tire infla-
tion pressure specifications for given tire sizes
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Wheels and tires
MOBILITY
3. Correct the tire inflation pressure if the ac-
tual tire inflation pressure deviates from the
intended tire inflation pressure.
pressure values on the control display, reset
the Tire Pressure Monitor (TPM).
If equipped with a flat tire monitor, reinitialize
the flat tire monitor.
4. Make sure that all valve caps are screwed
onto the tire valves.
Tire inflation pressures up to
100 mph/160 km/h
For speeds of up to 100 mph/160 km/h and for
optimum driving comfort, follow the tire infla-
tion pressure specifications in the tire pressure
table and adjust as necessary.
The tire inflation pressure specifications in the
tire inflation pressure table only relate to cold
tires or tires at the same temperature as the
ambient temperature.
Only check the tire inflation pressure levels
when the tires are cold, i.e.:
▷
A distance traveled of max. 1.25 miles/2 km
has not been exceeded.
▷
If the vehicle has not moved again for at
least two hours after a trip.
If equipped with an emergency wheel: check
the tire pressure of the emergency wheel in the
cargo area regularly and correct if necessary.
Checking using the tire inflation
pressure specifications on the control
display
The tire inflation pressure specifications can
also be found on the tire pressure label on the
driver's door pillar.
1.
Apps menu
2. "Vehicle"
Do not exceed a speed of 100 mph/160 km/h.
3. "Vehicle status"
4. "Tire Pressure Monitor"
Tire pressure values up to
100 mph/160 km/h
5. Check whether the current tire inflation
pressure levels deviate from the intended
tire pressure value.
430i
6. Correct the tire inflation pressure if the ac-
tual tire inflation pressure deviates from the
intended tire inflation pressure.
Tire size
Pressure specifications
in bar/PSI
Specifications in
bar/PSI with cold
tires
The display of current tire pressure on the con-
trol display may be restricted when the vehicle
is stationary. After a short drive, the tire pres-
sure is updated.
225/45 R 18 95 Y 2.2 / 32
XL
2.5 / 36
After correcting the tire pressure
If equipped with a Tire Pressure Monitor, the
corrected tire pressures are applied automati-
cally. Make sure that the tire settings are cor-
rect. With tires that cannot be found in the tire
285
Wheels and tires
MOBILITY
430i xDrive
Tire size
Pressure specifications
in bar/PSI
Tire size
Pressure specifications
in bar/PSI
225/45 R 18 95 H 2.2 / 32
XL A/S
2.5 / 36
Specifications in
bar/PSI with cold
tires
225/45 R 18 95 H
XL M+S
225/40 R 19 93 H 2.4 / 35
XL A/S
2.7 / 39
225/45 R 18 95 Y 2.3 / 33
XL
2.5 / 36
2.5 / 36
Front: 225/45 R
18 95 Y XL
2.2 / 32
-
225/45 R 18 95 H 2.3 / 33
XL A/S
Rear: 255/40 R
18 99 Y XL
-
2.2 / 32
225/45 R 18 95 H
XL M+S
Front: 225/40 R 2.4 / 35
19 93 Y XL
-
225/40 R 19 93 H 2.5 / 36
XL A/S
2.7 / 39
Rear: 255/35 R
19 96 Y XL
-
2.5 / 36
Front: 225/45 R
18 95 Y XL
2.3 / 33
-
Front: 225/35 R
20 90 Y XL
2.6 / 38
-
Rear: 255/40 R
18 99 Y XL
-
2.3 / 33
Rear: 255/30 R
20 92 Y XL
-
2.9 / 42
Front: 225/40 R 2.5 / 36
19 93 Y XL
-
Front: 225/45 R
18 95 V XL M+S
2.2 / 32
-
-
Rear: 255/35 R
19 96 Y XL
-
2.5 / 36
Rear: 255/40 R
18 99 V XL M+S
2.2 / 32
-
Front: 225/35 R
20 90 Y XL
2.8 / 41
-
Front: 225/40 R 2.4 / 35
19 93 H XL M+S
Rear: 255/30 R
20 92 Y XL
-
2.9 / 42
Rear: 255/35 R
19 96 H XL M+S
-
2.5 / 36
Front: 225/45 R
18 95 V XL M+S
2.3 / 33
-
-
Rear: 255/40 R
18 99 V XL M+S
2.3 / 33
-
Front: 225/40 R 2.5 / 36
19 93 H XL M+S
Rear: 255/35 R
19 96 H XL M+S
-
2.5 / 36
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Wheels and tires
MOBILITY
M440i
M440i xDrive
Tire size
Pressure specifications
in bar/PSI
Tire size
Pressure specifications
in bar/PSI
Specifications in
bar/PSI with cold
tires
Specifications in
bar/PSI with cold
tires
225/45 R 18 95 H 2.4 / 35
XL A/S
2.6 / 38
225/45 R 18 95 H 2.5 / 36
XL A/S
2.6 / 38
225/45 R 18 95 H
XL M+S
225/45 R 18 95 H
XL M+S
225/40 R 19 93 H 2.6 / 38
XL A/S
2.8 / 41
225/40 R 19 93 H 2.7 / 39
XL A/S
2.8 / 41
Front: 225/45 R
18 95 Y XL
2.4 / 35
-
Front: 225/45 R
18 95 Y XL
2.5 / 36
-
Rear: 255/40 R
18 99 Y XL
-
2.4 / 35
Rear: 255/40 R
18 99 Y XL
-
2.5 / 36
Front: 225/40 R 2.6 / 38
19 93 Y XL
-
Front: 225/40 R 2.7 / 39
19 93 Y XL
-
Rear: 255/35 R
19 96 Y XL
-
2.6 / 38
Rear: 255/35 R
19 96 Y XL
-
2.7 / 39
Front: 225/35 R
20 90 Y XL
2.8 / 41
-
Front: 225/35 R
20 90 Y XL
3.0 / 44
-
Rear: 255/30 R
20 92 Y XL
-
2.9 / 42
Rear: 255/30 R
20 92 Y XL
-
3.0 / 44
Front: 225/45 R
18 95 V XL M+S
2.4 / 35
-
-
Front: 225/45 R
18 95 V XL M+S
2.5 / 36
-
-
Rear: 255/40 R
18 99 V XL M+S
2.4 / 35
-
Rear: 255/40 R
18 99 V XL M+S
2.5 / 36
-
Front: 225/40 R 2.6 / 38
19 93 H XL M+S
Front: 225/40 R 2.7 / 39
19 93 H XL M+S
Rear: 255/35 R
19 96 H XL M+S
-
2.6 / 38
Rear: 255/35 R
19 96 H XL M+S
-
2.7 / 39
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Wheels and tires
MOBILITY
Tire pressures over
100 mph/160 km/h
Tire size
Pressure specifications
in bar/PSI
Front: 225/40 R 2.4 / 35
19 93 Y XL
-
Warning
When driving at speeds greater than
100 mph/160 km/h, incorrect tire pressures
can negatively affect vehicle handling, e.g.,
safety or comfort while driving. The tires can
become damaged, which may cause an ac-
cident. There is a risk of accident, injury,
or property damage. To drive at maximum
speeds, note the specified tire pressure for
driving above 100 mph/160 km/h in the tire
inflation pressure table, and adjust as neces-
sary.
Rear: 255/35 R
19 96 Y XL
-
2.5 / 36
Front: 225/35 R
20 90 Y XL
2.6 / 38
-
Rear: 255/30 R
20 92 Y XL
-
2.9 / 42
Front: 225/45 R
18 95 V XL M+S
2.4 / 35
-
-
Rear: 255/40 R
18 99 V XL M+S
2.4 / 35
-
Front: 225/40 R 2.6 / 38
19 93 H XL M+S
Tire pressure values over
100 mph/160 km/h
Rear: 255/35 R
19 96 H XL M+S
-
2.7 / 39
430i
Tire size
Pressure specifications
in bar/PSI
430i xDrive
Specifications in
bar/PSI with cold
tires
Tire size
Pressure specifications
in bar/PSI
Specifications in
bar/PSI with cold
tires
225/45 R 18 95 Y 2.4 / 35
XL
2.5 / 36
2.8 / 41
225/45 R 18 95 H 2.4 / 35
XL A/S
225/45 R 18 95 Y 2.4 / 35
XL
2.5 / 36
2.8 / 41
225/45 R 18 95 H
XL M+S
225/45 R 18 95 H 2.6 / 38
XL A/S
225/40 R 19 93 H 2.6 / 38
XL A/S
3.0 / 44
-
225/45 R 18 95 H
XL M+S
Front: 225/45 R
18 95 Y XL
2.4 / 35
225/40 R 19 93 H 2.8 / 41
XL A/S
3.0 / 44
-
Rear: 255/40 R
18 99 Y XL
-
2.4 / 35
Front: 225/45 R
18 95 Y XL
2.4 / 35
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Wheels and tires
MOBILITY
Tire size
Pressure specifications
in bar/PSI
Tire size
Pressure specifications
in bar/PSI
Rear: 255/40 R
18 99 Y XL
-
2.4 / 35
Rear: 255/40 R
18 99 Y XL
-
2.4 / 35
Front: 225/40 R 2.5 / 36
19 93 Y XL
-
Front: 225/40 R 2.6 / 38
19 93 Y XL
-
Rear: 255/35 R
19 96 Y XL
-
2.5 / 36
Rear: 255/35 R
19 96 Y XL
-
2.6 / 38
Front: 225/35 R
20 90 Y XL
2.8 / 41
-
Front: 225/35 R
20 90 Y XL
2.8 / 41
-
Rear: 255/30 R
20 92 Y XL
-
2.9 / 42
Rear: 255/30 R
20 92 Y XL
-
2.9 / 42
Front: 225/45 R
18 95 V XL M+S
2.6 / 38
-
-
Front: 225/45 R
18 95 V XL M+S
2.6 / 38
-
-
Rear: 255/40 R
18 99 V XL M+S
2.6 / 38
-
Rear: 255/40 R
18 99 V XL M+S
2.6 / 38
-
Front: 225/40 R 2.8 / 41
19 93 H XL M+S
Front: 225/40 R 2.8 / 41
19 93 H XL M+S
Rear: 255/35 R
19 96 H XL M+S
-
2.8 / 41
Rear: 255/35 R
19 96 H XL M+S
-
2.8 / 41
M440i
M440i xDrive
Tire size
Pressure specifications
in bar/PSI
Tire size
Pressure specifications
in bar/PSI
Specifications in
bar/PSI with cold
tires
Specifications in
bar/PSI with cold
tires
225/45 R 18 95 H 2.6 / 38
XL A/S
2.9 / 42
225/45 R 18 95 H 2.8 / 41
XL A/S
2.9 / 42
225/45 R 18 95 H
XL M+S
225/45 R 18 95 H
XL M+S
225/40 R 19 93 H 2.8 / 41
XL A/S
3.1 / 45
-
225/40 R 19 93 H 3.0 / 44
XL A/S
3.1 / 45
-
Front: 225/45 R
18 95 Y XL
2.4 / 35
Front: 225/45 R
18 95 Y XL
2.5 / 36
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Wheels and tires
MOBILITY
Locate the maximum tire load on the tire
sidewall and the Gross Axle Weight Rating –
GAWR – on the certification label on the driver
door B-pillar. Divide the tire load by 1.1. It must
be greater than one-half of the vehicle’s Gross
Axle Weight Rating – GAWR. Note, front vs.
rear GAWR and tire loads, respectively.
Tire size
Pressure specifications
in bar/PSI
Rear: 255/40 R
18 99 Y XL
-
2.5 / 36
Front: 225/40 R 2.7 / 39
19 93 Y XL
-
Rear: 255/35 R
19 96 Y XL
-
2.7 / 39
Speed letter
Designation Maximum speed
Front: 225/35 R
20 90 Y XL
3.0 / 44
-
Q
R
up to 100 mph/160 km/h
up to 106 mph/170 km/h
up to 112 mph/180 km/h
up to 118 mph/190 km/h
up to 131 mph/210 km/h
up to 150 mph/240 km/h
up to 167 mph/270 km/h
up to 186 mph/300 km/h
above 186 mph/300 km/h
Rear: 255/30 R
20 92 Y XL
-
3.0 / 44
S
Front: 225/45 R
18 95 V XL M+S
2.8 / 41
-
-
T
H
V
Rear: 255/40 R
18 99 V XL M+S
2.8 / 41
-
Front: 225/40 R 3.0 / 44
19 93 H XL M+S
W
Y
Rear: 255/35 R
19 96 H XL M+S
-
3.0 / 44
(Y)
Tire Identification Number
DOT code: DOT xxxx xxx 0124
xxxx: manufacturer code for the tire brand
xxx: tire size and tire design
0124: tire age
Tire marking
Tire size
245/45 R 18 96 Y
245: nominal width in mm
Tires with DOT codes meet the guidelines of
the U.S. Department of Transportation.
45: cross-sectional relationship in %
R: radial tire code
Tire age
18: rim diameter in inches
96: load index
Recommendation
Regardless of the tire tread depth, replace tires
at least every 6 years.
Y: speed code letter
ZR tires: reinforced radial tire for speeds ex-
ceeding 150 mph/240 km/h
Production date
You can find the tire production date on the tire
sidewall.
Maximum tire load
Maximum tire load is the maximum permissi-
ble weight for which the tire is approved.
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The traction grade assigned to this tire is
based on straight-ahead braking traction tests,
and does not include acceleration, cornering,
hydroplaning, or peak traction characteristics.
Designation
Production date
DOT … 0124
1st week of 2024
Uniform Tire Quality Grading
Quality grades can be found where applicable
on the tire sidewall between tread shoulder
and maximum section width.
Temperature
The temperature grades are A, the highest, B,
and C, representing the tire's resistance to the
generation of heat and its ability to dissipate
heat when tested under controlled conditions
on a specified indoor laboratory test wheel.
Sustained high temperature can cause the
material of the tire to degenerate and reduce
tire life, and excessive temperature can lead to
sudden tire failure. The grade C corresponds
to a level of performance which all passenger
car tires must meet under the Federal Motor
Vehicle Safety Standard No. 109. Grades Band
A represent higher levels of performance on
the laboratory test wheel than the minimum
required by law.
E.g.: Treadwear 200; Traction AA; Tempera-
ture A
DOT Quality Grades
Treadwear
Traction AA A B C
Temperature A B C
All passenger vehicle tires must conform to
Federal Safety Requirements in addition to
these grades.
Treadwear
The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified gov-
ernment test course. E.g., a tire graded 150
would wear one and one-half, 1 g, times as
well on the government course as a tire graded
100. The relative performance of tires depends
upon the actual conditions of their use, how-
ever, and may depart significantly from the
norm due to variations in driving habits, service
practices and differences in road characteris-
tics and climate.
Warning
The temperature grade for this tire is estab-
lished for a tire that is properly inflated and
not overloaded. Excessive speed, underinfla-
tion, or excessive loading, either separately
or in combination, can cause heat buildup
and possible tire failure.
Runflat tires
Runflat tires, refer to page 295, are labeled
with a circular icon containing the letters RSC
marked on the tire sidewall.
Traction
The traction grades, from highest to lowest,
are AA, A, B, and C.
M+S
Winter tires, as well as all-season tires with
better winter performance than summer tires,
can be identified by the M+S marking on the
tire side wall.
Those grades represent the tire's ability to
stop on wet pavement as measured under
controlled conditions on specified government
test surfaces of asphalt and concrete. A tire
marked C may have poor traction perform-
ance.
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Wheels and tires
MOBILITY
▷
▷
▷
Unusual vibrations.
Tire tread
Safety information
Warning
Unusual tire or running noises.
Unusual vehicle handling such as a strong
tendency to pull to the left or right.
▷
Uneven wear pattern, e.g., increased wear
in the area of the tire shoulder.
If the tire tread depth is too low, driving
safety may be impaired in critical situations
such as aquaplaning or slush on the road.
There is a risk of accident, injury, or property
damage. The tire tread depth may not fall
below 0.12 in/3 mm for summer tires and
0.16 in/4 mm for winter and all-season tires,
or observe the statutory regulations on mini-
mum tread depth.
Damage can be caused by the following situa-
tions, for instance:
▷
▷
▷
▷
▷
Driving over curbs.
Road damage.
Tire pressure too low.
Vehicle overloading.
Incorrect tire storage.
Safety information
Minimum tread depth
Warning
Damaged tires can lose tire inflation pres-
sure, which can lead to loss of vehicle control.
There is a risk of accident, injury, or property
damage. If tire damage is suspected while
driving, immediately reduce speed and stop.
Have wheels and tires checked. To do so,
drive carefully to an authorized service center
or another qualified service center or repair
shop. Have the vehicle towed or transported
as needed. Do not repair damaged tires, but
have them replaced.
The tire manufacturer’s wear indicators are
distributed over the tire circumference. These
indicators have a height of min. 0.06 in/1.6 mm
and serve as an indicator for tire tread wear.
The positions of the wear indicators are
marked on the tire sidewall with TWI, Tread
Wear Indicator.
Warning
The wheels, tires and chassis components
can become damaged when driving over
curbs, road damage, or other obstacles.
Larger wheels have a smaller tire cross-sec-
tion. The smaller the tire cross-section, the
higher the risk of tire damage. There is a
risk of accident, injury, or property damage. If
possible, avoid driving over curbs, road dam-
age or other obstacles, or drive over them
slowly and carefully.
Tire damage
General information
Check your tires regularly for damage, foreign
objects lodged in the tread, and tread wear.
Indications of tire damage or another vehicle
malfunction:
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Wheels and tires
MOBILITY
or property damage. Do not mount steel
wheels.
Exchanging wheels and
tires
Mounting and wheel balancing
Warning
Have the wheel mounted and balanced by an
authorized service center or another qualified
service center or repair shop.
Wheel/tire combinations that are not suitable
for the vehicle can affect vehicle handling
and a number of system functions, e.g.,the
Antilock Braking System or Dynamic Stability
Control. There is a risk of accident, injury, or
property damage. The manufacturer of the
vehicle recommends that you use wheels and
tires that have been recommended by the
vehicle manufacturer for the vehicle type. Fol-
lowing tire damage, have the original wheel/
tire combination remounted on the vehicle as
soon as possible.
Suitable wheels and tires
General information
Only certain wheel/tire combinations are suit-
able depending on vehicle and equipment.
The vehicle manufacturer determines wheel/
tire combinations on the basis of the following
criteria:
▷
▷
Tire size, e.g., tire width, aspect ratio.
Wheel size, e.g., rim diameter, offset.
Recommended tire brands
For more information on wheel/tire combina-
tions and special equipment, contact an au-
thorized service center or another qualified
service center or repair shop.
Safety information
Warning
Wheels and tires that are not suitable for
the vehicle can damage parts of the vehicle.
There is a risk of accident, injury, or prop-
erty damage. The vehicle manufacturer rec-
ommends that you use only wheels and tires
that have been recommended for the vehicle
type.
Tire types are developed for each vehicle and
optimized specifically for the individual require-
ments of that vehicle, e.g.:
▷
▷
▷
Vehicle handling.
Comfort.
Noise characteristics.
Specially developed tires are marked with
a star on the tire sidewall. After replacing
wheels and tires, the vehicle manufacturer rec-
ommends using star-marked tires again. The
vehicle manufacturer recommends that you
use tires of the same make and tread design.
Warning
Mounted steel wheels can cause technical
problems, for instance unexpected loosening
of the lug bolts and damage to the brake
disks. There is a risk of accident, injury,
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New tires
Winter tires
Tire traction is not optimal due to manufactur-
ing circumstances when tires are brand new.
Drive conservatively for the first
200 miles/300 km.
Retreaded tires
Warning
Retreated tires can have different tire casing
structures. With advanced age the service life
can be limited. There is a risk of accident,
injury, or property damage. The manufacturer
of the vehicle does not recommend the use of
retreaded tires.
Winter tires are recommended for operating on
winter roads.
Winter tires can be identified by the moun-
tain/snowflake icon and the letters M+S on the
tire sidewall.
So-called all-season tires with M+S marking
but without mountain and snowflake icon have
better winter properties than summer tires.
As a rule, all-season tires do not perform the
same as winter tires.
Maximum speed
Safety information
Changing runflat tires
Warning
When changing from runflat tires to standard
tires, it must be ensured that the vehicle con-
tains an emergency wheel or tire mobility kit.
For more information, contact an authorized
service center or another qualified service cen-
ter or repair shop.
If the maximum permissible speed of your
mounted tires is exceeded, the tires may be
damaged. There is a risk of accident, injury,
or property damage. Do not exceed the maxi-
mum permissible speed of the tires.
Maximum speed of winter tires
Wheel change between axles
If the maximum speed of the vehicle is higher
than the maximum permissible speed of the
winter tires, the maximum permissible speed
must be indicated with a sign placed in the
field of vision. The info label is available from
an authorized service center or another quali-
fied service center or repair shop.
Warning
A wheel change between the axles on vehi-
cles with different tire sizes or rim sizes on
the front and rear axles can cause damage
to the tires and the vehicle. There is a risk of
accident, injury, or property damage. Do not
rotate the tires between the axles on vehicles
with different tire sizes or rim sizes on the
front and rear axles.
Different abrasion patterns can occur on the
front and rear axles depending on individual
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Wheels and tires
MOBILITY
driving conditions. The tires can be rotated in
pairs between the axles to achieve even abra-
sion. For more information, contact an author-
ized service center or another qualified service
center or repair shop. After changing, check
the tire pressure and correct, if needed.
Safety information
Warning
The vehicle handles differently when a runflat
tire has insufficient or no tire pressure; for
instance, reduced directional stability when
braking, braking distances are longer and the
self-steering properties will change. There is
a risk of accident, injury, or property damage.
Drive moderately and do not exceed a speed
of 50 mph/80 km/h.
Storing tires
Tire pressure
Do not exceed the maximum tire inflation pres-
sure indicated on the tire sidewall.
Storage
Warning
▷
Store wheels and tires in a cool, dry and
dark place.
Vibrations or loud noises while driving can
indicate the final failure of a tire. Tire com-
ponents may come loose. There is a risk of
accident, injury, or property damage. Reduce
your speed and stop. Do not continue driving.
Contact an authorized service center or an-
other qualified service center or repair shop.
▷
Always protect tires against all contact with
oil, grease, and solvents.
▷
▷
Do not leave the tires in plastic bags.
Remove dirt from wheels or tires.
Runflat tires
Identification
Principle
Runflat tires permit continued driving under
limited conditions even in the event of a com-
plete tire pressure loss.
General information
The wheels consist of tires that are self-sup-
porting to a limited degree and may also in-
clude special rims.
Runflat tires are labeled with a circular icon
containing the letters RSC marked on the tire
sidewall.
The reinforcement of the sidewall allows the
tire to remain drivable to a limited degree in
the event of a tire pressure loss.
Follow the instructions for continued driving
with a flat tire.
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MOBILITY
Overview
Repairing a flat tire
Storage
Safety precautions
Depending on vehicle equipment, the tire re-
pair set is stored as follows:
▷
Park the vehicle on solid and non-slip
ground at a safe distance from road traffic.
Turn on the hazard warning system.
Set the parking brake.
▷
In the cargo area under the cargo floor
panel.
▷
▷
▷
▷
▷
In the cargo area on the left or right side.
In the cargo area behind a side trim panel.
Turn the steering wheel until the front
wheels are in the straight-ahead position
and engage the steering wheel lock.
Sealant bottle and filler hose
▷
▷
As soon as permitted by the traffic flow,
have all vehicle occupants get out and
make sure that they remain outside the
hazardous area such as behind a guardrail.
If necessary, set up the hazard triangle or
hazard warning lights at an appropriate
distance.
Tire repair set
1
Sealant bottle
2
3
4
5
Sealant bottle outlet
Filler hose
Principle
The tire repair set is used to temporarily seal
minor tire damage so that it is possible to con-
tinue driving.
Sealant bottle connection
Wheel valve connection
General information
Compressor
▷
The filled in tire sealant closes the damage
from the inside when it hardens.
▷
Follow the instructions for using the tire
repair set, which are provided on the com-
pressor and sealant bottle.
▷
▷
The tire repair set may be insufficient if the
tire damage measures more than approx.
0.16 in/4 mm.
Do not remove foreign objects that have
penetrated the tire. Remove foreign objects
only when they are visibly protruding from
the tire.
1
Compressor
2
3
4
Tire pressure display
Sealant bottle mount
Pressure reducing valve button
▷
The compressor can be used to check the
tire inflation pressure.
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Preparing the tire repair set
1. Insert the sealant bottle into the mount on
the housing of the compressor.
5
6
Connector for socket
Power switch
Safety precautions
▷
Park the vehicle as far away as possible
from passing traffic and on solid ground.
▷
▷
▷
Turn on the hazard warning system.
Set the parking brake.
Turn the steering wheel until the front
wheels are in the straight-ahead position
and engage the steering wheel lock.
2. Turn the sealant bottle clockwise by 90° to
the stop.
▷
As soon as permitted by the traffic flow,
have all vehicle occupants get out and
make sure that they remain outside the
hazardous area such as behind a guardrail.
▷
▷
If necessary, set up the hazard triangle or
hazard warning lights at an appropriate
distance.
Remove the warning label for the maximum
permissible speed from the sealant bottle
and attach it in the visible area in the vehi-
cle interior.
3. Connect the filler hose to the outlet of the
sealant bottle and turn clockwise by 90° to
the stop.
4. Unscrew the valve cap on the wheel.
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Wheels and tires
MOBILITY
5. Screw the filler hose connector clockwise
onto the valve.
Let the compressor run for max. 10 minutes
to fill in the tire sealant and reach a tire
pressure of 2.5 bar/36 psi.
While the tire is being filled with tire sealant,
the tire pressure can briefly reach approx.
6 bar/87 psi. Do not turn off the compres-
sor in this phase.
2. Turn off the compressor on the device.
Checking the tire pressure
Read the tire pressure on the tire pressure dis-
play of the compressor. The tire pressure must
be at least 2.5 bar/36 psi.
6. With the compressor switched off, insert the
connector into the power socket in the vehi-
cle interior.
Tire pressure too high
If the tire pressure is too high, reduce the tire
pressure with the pressure reducing valve on
the compressor.
Filling the tire with sealing
compound
Safety information
Minimum tire inflation pressure is not
reached
Do not continue driving unless a minimum tire
pressure of 2.5 bar/36 psi is reached. Contact
an authorized service center or another quali-
fied service center or repair shop.
DANGER
If the exhaust pipe is blocked or ventilation is
insufficient, harmful exhaust gases can pene-
trate the vehicle. The exhaust gases contain
pollutants which are colorless and odorless.
In enclosed areas, exhaust gases can also
accumulate outside of the vehicle. There is a
danger to life. Keep the exhaust pipe free and
ensure sufficient ventilation.
Minimum tire inflation pressure is
reached
1. Pull the connector out of the socket in the
vehicle interior.
2. Disconnect the filler hose from the sealant
bottle and the valve on the wheel.
NOTICE
3. Screw the valve cap onto the valve.
4. Stow the tire repair set in the trunk.
The compressor can overheat during ex-
tended operation. There is a risk of damage
to property. Do not run the compressor for
more than 10 minutes.
5. Immediately drive 6 miles/10 km to ensure
that the tire sealant is evenly distributed in
the tire.
Do not exceed the speed limit of
50 mph/80 km/h.
Filling the tire with sealing compound
1. With standby state or drive-ready state on,
turn on the compressor on the device.
If possible, do not drive at speeds less than
12 mph/20 km/h.
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Wheels and tires
MOBILITY
Tire sealant may spray from the damaged
area during the initial wheel rotations.
3. Disconnect the filler hose from the com-
pressor and the valve on the wheel.
4. Screw the valve cap onto the valve.
Adjusting the tire pressure
1. Stop at a suitable location.
5. Stow the tire repair set together with the
filler hose in the trunk.
2. Connect the filler hose directly to the com-
pressor, then turn it clockwise 90° in the
mount until it engages audibly.
Continuing the trip
Do not exceed the speed limit of
50 mph/80 km/h.
3. Unscrew the valve cap on the wheel.
4. Screw the filler hose connector onto the
valve.
Do not exceed a maximum distance traveled of
125 miles/200 km.
Re-initialize the flat tire monitor or reset the
Tire Pressure Monitor.
Replace the faulty tire and the sealant bottle
from the tire repair set as soon as possible.
Additional information:
▷
▷
Flat tire monitor, refer to page 308.
Tire pressure monitor, refer to page 300.
System limits
If the tire cannot be made drivable, contact an
authorized service center or another qualified
service center or repair shop.
5. Insert the connector into the socket in the
vehicle interior.
6. Read the tire pressure on the tire pressure
display of the compressor.
With Tire Pressure Monitor: Using sealant can
damage the air pressure sensor. In this case,
have the electronics checked and replaced at
the next opportunity.
Do not continue driving unless a minimum
tire pressure of 1.3 bar/19 psi is displayed.
Contact an authorized service center or an-
other qualified service center or repair shop.
7. Correct the tire pressure to 2.5 bar/36 psi.
▷
Increase tire pressure: with standby or
drive-ready state turned on, turn on the
compressor and let it run for a maxi-
mum of 10 minutes.
Snow chains
Safety information
Warning
▷
Reduce tire pressure: Press the pres-
sure reducing valve button on the com-
pressor.
Mounting snow chains on unsuitable tires
can cause the snow chains to come into
contact with vehicle parts. There is a risk of
accident, injury, or property damage. Only
fit snow chains on tires recommended by
the vehicle manufacturer for use with snow
chains.
Removing and stowing the tire
repair set
1. Switch off the compressor.
2. Pull the connector out of the socket in the
vehicle interior.
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MOBILITY
Warning
If vehicle is equipped with flat tire monitor:
When using snow chains, do not initialize the
flat tire monitor, otherwise, incorrect values
may be displayed.
Insufficiently tight snow chains may damage
tires and vehicle components. There is a risk
of accident, injury, or property damage. Make
sure that the snow chains are always suf-
ficiently tight. Re-tighten as needed accord-
ing to the snow chain manufacturer's instruc-
tions.
When driving with snow chains, activate the
Dynamic Traction Control briefly to optimize
the drive power.
Maximum speed with snow chains
Do not exceed a speed of 30 mph/50 km/h
when using snow chains.
Fine-link snow chains
The manufacturer of the vehicle recommends
the use of fine-link snow chains. Certain types
of fine-link snow chains have been tested by
the manufacturer of the vehicle and recom-
mended as road-safe and suitable.
Tire pressure monitor
Principle
The Tire Pressure Monitor monitors the tire
pressure and issues a warning if the tire pres-
sure has dropped.
For information on suitable snow chains, con-
tact an authorized service center or another
qualified service center or repair shop.
General information
Sensors in the tire valves measure the tire in-
flation pressure and tire temperature.
Use
Use is only permitted in pairs on rear wheels
equipped with the tires of the following wheel/
tire sizes:
Depending on the tires detected or registered,
the system displays the specified nominal
pressures on the control display and compares
them with the current tire pressures.
Tire size
Wheel size Rim offset (IS)
25
225/45 R18 7.5J x 18
If tires are being used that are not specified
in the tire inflation pressure details on the ve-
hicle such as tires with special approval, the
system needs to be actively reset. The system
will then take over the actual tire inflation pres-
sures as the target pressures.
Information on the wheel size and rim offset is
located on the inside of the wheel.
The list can also include wheel/tire sizes that
are only suitable for certain models.
Information on wheels and tires approved for
the vehicle can be requested from an author-
ized service center or another qualified service
center or repair shop.
When operating the system, also note the in-
formation found in the Tire inflation pressure
chapter.
Additional information:
Follow the snow chain manufacturer's instruc-
tions.
Tire inflation pressure, refer to page 284.
If vehicle is equipped with Tire Pressure Moni-
tor: When using snow chains, do not reset the
Tire Pressure Monitor, otherwise, incorrect val-
ues may be displayed.
300
Wheels and tires
MOBILITY
Safety information
Tire settings
General information
The information about the mounted tires can
be entered in the tire settings if the system
does not automatically detect the tires.
Warning
The display of the target pressures is not
a substitute for the tire inflation pressure de-
tails on the vehicle. Incorrect entries in the
tire settings can lead to incorrect target tire
inflation pressure values. In this case, it can-
not be guaranteed that the notification of a
tire pressure loss will be reliable. There is a
risk of injury and risk of damage to property.
Make sure that the sizes of your mounted
tires are displayed correctly and match the
information on the tires and the tire inflation
pressure specifications on the vehicle.
The tire sizes of the mounted tires can be
gathered from the tire inflation pressure details
on the vehicle or directly on the tires.
The tire details do not need to be re-entered
when the tire pressure is corrected.
For summer and winter tires, the tire details
entered last are stored. After a tire or wheel
change, the settings of the tire sets used last
can be selected.
Adjusting the tires
Functional requirements
The following prerequisites must be met for
the system; otherwise, reliable notification of a
tire pressure loss is not assured:
1.
Apps menu
2. "Vehicle"
3. "Vehicle status"
4. "Tire Pressure Monitor"
5. "Tire settings"
▷
After each tire or wheel change, the system
detects and updates the mounted tires on
the control display and displays them after
a short trip.
6. "Tire selection"
7. "Manual"
Enter the information about the mounted
tires in the tire settings when the system
does not automatically detect the tires.
8. "Tire type"
9. Select the tire size for the rear axle.
For tires with special approval:
"Other tires"
▷
▷
The Tire Pressure Monitor does not acti-
vate until after driving for a few minutes:
▷
▷
After a tire or wheel change.
Observe further proceeding in the perform
a reset section.
After a reset, when using tires with spe-
cial approval.
10. Select the maximum speed to be driven.
11. "Save tire settings"
▷
After changing the tire setting.
For tires with special approval:
The measurement of the current tire inflation
pressure is started. The measurement prog-
ress is displayed.
▷
After a tire or wheel change, a reset was
performed with the correct tire inflation
pressure.
▷
After the tire inflation pressure was ad-
justed to a new value, a reset was per-
formed.
▷
Wheels with air pressure sensor.
301
Wheels and tires
MOBILITY
The nominal pressure is immediately adjusted
if the vehicle load state is changed in the tire
settings.
Status display
Current status
The system status can be displayed on the
control display, e.g., whether or not the system
is active.
Tire conditions
General information
Tire and system status are indicated by the
color of the wheels and a text message on the
control display.
1.
Apps menu
2. "Vehicle"
3. "Vehicle status"
Any existing messages may not be deleted if
the nominal pressure is not reached after the
tire inflation pressure is corrected.
4. "Tire Pressure Monitor"
The current status is displayed.
Current tire pressure
The current tire pressure is displayed for each
tire.
All wheels green
▷
The system is active and bases warnings
on the target pressures.
The current tire inflation pressures may
change while driving or depending on the out-
side temperature.
▷
For tires with special approval: the system
is active and bases warnings on the tire
inflation pressures stored during the last re-
set.
Current tire temperature
The current tire temperatures are displayed
depending on the model.
One to four yellow wheels
A flat tire or major tire pressure loss has occur-
red in the indicated tires.
The current tire temperatures may change
while driving or due to the outside tempera-
ture.
Gray wheels
It may not be possible to identify tire pressure
losses.
Nominal pressure
The nominal pressure for the tires on the front
and rear axles is displayed.
Possible causes:
▷
▷
Malfunction.
The specified nominal pressures take the in-
fluence of driving and outside temperature on
the tire temperature into account. The appro-
priate nominal pressure is always displayed,
independent of the weather situation, tire tem-
peratures and travel times.
During tire inflation pressure measurement,
after confirmation of the tire settings.
▷
For tires with special approval: a reset is
performed for the system.
The displayed nominal pressure may change
and may differ from the tire inflation pressure
details on the door pillar of the driver's door.
The tire inflation pressure can thus be cor-
rected to the value of the displayed target
pressures.
For tires with special approval:
performing a reset
1.
Apps menu
2. "Vehicle"
3. "Vehicle status"
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Wheels and tires
MOBILITY
4. "Tire Pressure Monitor"
If a tire inflation pressure check is
required
5. Make sure that the tire settings are correct.
Tire settings, refer to page 301.
Message
6. Turn on drive-ready state and do not drive
off.
An icon with a Check Control message appears
on the control display.
7. "Perform reset".
8. Drive off.
Icon
Possible cause
Leak detected on the tire.
The wheels are shown in gray and the tire
pressure is reset.
Inflation was not carried out ac-
cording to specifications, for in-
stance when the tire has not been
sufficiently inflated or in the case of
a natural steady tire pressure loss.
After a travel time of several minutes, the set
tire inflation pressures are accepted as the
predefined tire inflation pressures. The reset is
completed automatically while driving.
After resetting, the wheels are shown in green
on the control display and a message appears.
Measure
Check the tire pressure and correct as needed.
If the tire inflation pressure is too low
Message
You may interrupt this trip at any time. When
you continue driving the reset resumes auto-
matically.
Messages: for tires without special
approval
A yellow warning light is illuminated in
the instrument cluster.
General information
When a flat tire is indicated, the Dynamic Sta-
bility Control may be turned on.
In addition, an icon with a Check Control mes-
sage appears on the control display.
Icon
Possible cause
Safety information
There is a tire pressure loss.
Warning
A damaged regular tire with low or no tire
inflation pressure impacts handling such as
steering and braking response. Runflat tires
can maintain limited stability. There is a risk
of accident. Do not continue driving if the
vehicle is equipped with normal tires. Follow
the information on runflat tires and continued
driving with these tires.
Measure
1. Reduce the vehicle speed. Do not exceed a
speed of 80 mph/130 km/h.
2. At the next opportunity, for instance at a fill-
ing station, check the tire inflation pressure
in all four tires and correct if necessary.
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Wheels and tires
MOBILITY
If there is a significant tire pressure
loss
Safety information
Warning
Message
A damaged regular tire with low or no tire
inflation pressure impacts handling such as
steering and braking response. Runflat tires
can maintain limited stability. There is a risk
of accident. Do not continue driving if the
vehicle is equipped with normal tires. Follow
the information on runflat tires and continued
driving with these tires.
A yellow warning light is illuminated in
the instrument cluster.
In addition, an icon with the affected tire ap-
pears in a Check Control message on the con-
trol display.
Icon
Possible cause
There is a flat tire or a major tire
pressure loss.
If a tire inflation pressure check is
required
Measure
Message
1. Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu-
vers.
An icon with a Check Control message appears
on the control display.
Icon
Possible cause
2. Check whether the vehicle is fitted with
standard tires or runflat tires.
Inflation was not carried out ac-
cording to specifications, e.g., the
tire has not been sufficiently in-
flated.
Runflat tires are labeled with a circular icon
containing the letters RSC marked on the
tire sidewall.
Runflat tires, refer to page 295.
The system has detected a wheel
change, but no reset was done.
3. Read the description on what to do in case
of a flat tire.
The tire inflation pressure has
fallen below the level of the last re-
set.
Actions in the event of a flat tire, refer to
page 305.
No reset was performed for the
system. The system issues a
warning based on the tire inflation
pressures stored during the last re-
set.
Messages: for tires with special
approval
General information
When a flat tire is indicated, the Dynamic Sta-
bility Control may be turned on.
Measure
1. Check the tire pressure and correct as
needed.
2. Perform a system reset.
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Wheels and tires
MOBILITY
If the tire inflation pressure is too low
Icon
Possible cause
There is a flat tire or a major tire
pressure loss.
Message
A yellow warning light is illuminated in
the instrument cluster.
No reset was performed for the
system. The system issues a
warning based on the tire inflation
pressures stored during the last re-
set.
In addition, an icon with a Check Control mes-
sage appears on the control display.
Icon
Possible cause
Measure
There is a tire pressure loss.
1. Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu-
vers.
No reset was performed for the
system. The system issues a
warning based on the tire inflation
pressures stored during the last re-
set.
2. Check whether the vehicle is fitted with
standard tires or runflat tires.
Runflat tires are labeled with a circular icon
containing the letters RSC marked on the
tire sidewall.
Measure
1. Reduce the vehicle speed. Do not exceed a
speed of 80 mph/130 km/h.
Runflat tires, refer to page 295.
2. At the next opportunity, for instance at a fill-
ing station, check the tire inflation pressure
in all four tires and correct if necessary.
3. Read the description on what to do in case
of a flat tire.
Actions in the event of a flat tire, refer to
page 305.
3. Perform a system reset.
If there is a significant tire pressure
loss
Actions in the event of a flat tire
Standard tires
1. Identify the damaged tire.
Message
A yellow warning light is illuminated in
the instrument cluster.
Check the tire pressure in all four tires,
for instance using the tire pressure display
of a flat tire kit.
In addition, an icon with the affected tire ap-
pears in a Check Control message on the con-
trol display.
For tires with special approval: when the
tire pressure in all four tires is correct, the
Tire Pressure Monitor may not have been
reset. In this case, perform the reset.
If no tire damage can be identified, con-
tact an authorized service center or another
qualified service center or repair shop.
2. Repair the flat tire, e.g., with a flat tire kit or
by changing the wheel.
305
Wheels and tires
MOBILITY
Using sealant, e.g., from the flat tire kit, may
damage the air pressure sensor. Replace the
air pressure sensor at the next opportunity.
Possible driving distance with a flat tire
The possible driving distance which may be
safely traveled varies depending on how the
vehicle is loaded and used, e.g., speed, road
conditions, outside temperature. The distance
traveled may be less but may also be more if
an economical driving style is used.
Runflat tires
Safety information
If the vehicle is loaded with an average
weight and used under favorable conditions,
the possible distance traveled may be up to
50 miles/80 km.
Warning
The vehicle handles differently when a runflat
tire has insufficient or no tire pressure; for
instance, reduced directional stability when
braking, braking distances are longer and the
self-steering properties will change. There is
a risk of accident, injury, or property damage.
Drive moderately and do not exceed a speed
of 50 mph/80 km/h.
Vehicle handling with damaged tires
Vehicles driven with a damaged tire will han-
dle differently, potentially leading to conditions
such as the following:
▷
▷
▷
Greater likelihood of skidding of the vehicle.
Longer braking distances.
Changed self-steering properties.
Warning
Modify your driving style. Avoid abrupt steering
or driving over obstacles, for instance curbs or
potholes.
Vibrations or loud noises while driving can
indicate the final failure of a tire. Tire com-
ponents may come loose. There is a risk of
accident, injury, or property damage. Reduce
your speed and stop. Do not continue driving.
Contact an authorized service center or an-
other qualified service center or repair shop.
System limits
Temperature
The tire inflation pressure depends on the
tire's temperature.
Maximum speed
Driving or exposure to the sun will increase the
tire temperature, thus increasing the tire infla-
tion pressure.
You may continue driving with a damaged tire
at speeds up to 50 mph/80 km/h.
The tire inflation pressure is reduced when the
tire temperature falls again.
Continued driving with a flat tire
Follow the following when continuing to drive
with a damaged tire:
These circumstances may cause a warning
when temperatures fall very sharply.
1. Avoid sudden braking and steering maneu-
vers.
Following a temperature-related warning, the
target pressures are displayed on the control
display again after a short distance.
2. Do not exceed a speed of
50 mph/80 km/h.
3. Check the tire inflation pressure in all four
tires at the next opportunity.
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Wheels and tires
MOBILITY
vehicle has tires of a different size than the
size indicated on the vehicle placard or tire
inflation pressure label, you should determine
the proper tire inflation pressure for those
tires.) As an added safety feature, the vehi-
cle has been equipped with a tire pressure
monitoring system (TPMS) that illuminates a
low tire pressure telltale when one or more
of your tires is significantly under-inflated. Ac-
cordingly, when the low tire pressure telltale
illuminates, you should stop and check your
tires as soon as possible, and inflate them to
the proper pressure. Driving on a significantly
under-inflated tire causes the tire to overheat
and can lead to tire failure. Under-inflation also
reduces fuel efficiency and tire tread life, and
may affect the vehicle's handling and stopping
ability. Please note that the TPMS is not a
substitute for proper tire maintenance, and it
is the driver's responsibility to maintain correct
tire pressure, even if under-inflation has not
reached the level to trigger illumination of the
TPMS low tire pressure telltale. The vehicle
has also been equipped with a TPMS malfunc-
tion indicator to indicate when the system is
not operating properly. The TPMS malfunction
indicator is combined with the low tire pres-
sure telltale. When the system detects a mal-
function, the telltale will flash for approximately
one minute and then remain continuously il-
luminated. This sequence will continue upon
subsequent vehicle start-ups as long as the
malfunction exists. When the malfunction indi-
cator is illuminated, the system may not be
able to detect or signal low tire pressure as
intended. TPMS malfunctions may occur for a
variety of reasons, including the installation of
replacement or alternate tires or wheels on the
vehicle that prevent the TPMS from function-
ing properly. Always check the TPMS malfunc-
tion telltale after replacing one or more tires
or wheels on the vehicle to ensure that the re-
placement or alternate tires and wheels allow
the TPMS to continue to function properly.
Sudden tire pressure loss
The system cannot indicate sudden and se-
rious tire damage caused by external circum-
stances.
Failure performing a reset
Tires with special approval: the system will not
function correctly if a reset was not performed,
for example a flat tire may be indicated al-
though the tire inflation pressures are correct.
Malfunction
Message
The yellow warning light flashes and is
then illuminated continuously. A Check
Control message is displayed. It may
not be possible to identify tire pressure losses.
Measure
▷
A wheel without air pressure sensor is
mounted: Have the wheels checked as
needed.
▷
Fault caused by systems or devices with
the same transmission frequency: The sys-
tem automatically reactivates after leaving
the area of the interference.
▷
▷
For tires with special approval: the system
was unable to complete the reset. Perform
a system reset again.
If the Tire Pressure Monitor malfunctions:
Have the vehicle checked by an authorized
service center or another qualified service
center or repair shop.
Declaration according to NHTSA/
FMVSS 138 Tire Pressure Monitoring
System
Each tire, including the spare (if provided)
should be checked monthly when cold and in-
flated to the inflation pressure recommended
by the vehicle manufacturer on the vehicle
placard or tire inflation pressure label. (If the
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Wheels and tires
MOBILITY
▷
▷
After the tire inflation pressure has been
adjusted.
Flat tire monitor
After a tire or wheel change.
Principle
The flat tire monitor detects a tire pressure
loss while driving and issues a warning if the
tire pressure has dropped.
Performing initialization
When initializing, the set tire inflation pressures
serve as reference values in order to detect a
flat tire. Initialization is started by confirming
the tire inflation pressures.
General information
The system detects tire pressure loss on the
basis of rotation speed differences between
the individual wheels while driving.
Do not initialize the system when driving with
snow chains.
1.
Apps menu
In the event of a tire pressure loss, the diam-
eter and therefore the rate of rotation of the
corresponding wheel changes. The difference
will be detected and reported as a flat tire.
2. "Vehicle"
3. "Vehicle status"
4. "FLAT TIRE MONITOR"
The system does not measure the actual infla-
tion pressure in the tires.
5. Turn on drive-ready state and do not drive
off.
6. "Perform reset"
7. Drive off.
Functional requirements
The following prerequisites must be met for
the system; otherwise, reliable notification of a
tire pressure loss is not assured:
The initialization is completed while driving,
which can be interrupted at any time.
The initialization automatically continues when
driving continues.
▷
After a tire or wheel change, an initialization
was carried out at the correct tire pressure.
▷
After the tire pressure was adjusted to a
new value, an initialization was performed.
Messages
General information
When a flat tire is indicated, the Dynamic Sta-
bility Control (DSC) is turned on, if needed.
Status display
The current status of the flat tire monitor can
be displayed, e.g., whether the flat tire monitor
is active.
Safety information
1.
Apps menu
2. "Vehicle"
Warning
3. "Vehicle status"
4. "FLAT TIRE MONITOR"
The status is displayed.
A damaged regular tire with low or no tire
inflation pressure impacts handling such as
steering and braking response. Runflat tires
can maintain limited stability. There is a risk
of accident. Do not continue driving if the
vehicle is equipped with normal tires. Follow
Initialization required
An initialization must be performed in the fol-
lowing situations:
308
Wheels and tires
MOBILITY
the information on runflat tires and continued
driving with these tires.
If tire damage cannot be identified, contact
an authorized service center or another
qualified service center or repair shop.
2. Repair the flat tire, e.g., with a flat tire kit or
by changing the wheel.
Indication of a flat tire
A yellow warning light is illuminated in
the instrument cluster.
Runflat tires
In addition, an icon with a Check Control mes-
sage appears on the control display.
Safety information
Icon
Possible cause
Warning
The vehicle handles differently when a runflat
tire has insufficient or no tire pressure; for
instance, reduced directional stability when
braking, braking distances are longer and the
self-steering properties will change. There is
a risk of accident, injury, or property damage.
Drive moderately and do not exceed a speed
of 50 mph/80 km/h.
There is a flat tire or a major tire
pressure loss.
Measure
1. Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu-
vers.
2. Check whether the vehicle is fitted with
standard tires or runflat tires.
Warning
Runflat tires are labeled with a circular icon
containing the letters RSC marked on the
tire sidewall.
Vibrations or loud noises while driving can
indicate the final failure of a tire. Tire com-
ponents may come loose. There is a risk of
accident, injury, or property damage. Reduce
your speed and stop. Do not continue driving.
Contact an authorized service center or an-
other qualified service center or repair shop.
Runflat tires, refer to page 295.
3. Read the description on what to do in case
of a flat tire.
Actions in the event of a flat tire
Maximum speed
Standard tires
You may continue driving with a damaged tire
at speeds up to 50 mph/80 km/h.
1. Identify the damaged tire.
To do this, check the tire pressure in all four
tires, for instance using the tire pressure
display of a flat tire kit.
When the tire inflation pressure in all four
tires is correct, the flat tire monitor may not
have been initialized. In this case, initialize
the system.
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Wheels and tires
MOBILITY
Continued driving with a flat tire
▷
▷
A natural, even tire pressure loss in all
four tires will not be recognized. Therefore,
check the tire inflation pressure regularly.
Follow the following when continuing to drive
with a damaged tire:
Sudden and serious tire damage caused
by external circumstances cannot be recog-
nized in advance.
1. Avoid sudden braking and steering maneu-
vers.
2. Do not exceed a speed of
50 mph/80 km/h.
▷
▷
▷
The system has not been initialized.
When driving on a snowy or slippery road.
3. Check the tire inflation pressure in all four
tires at the next opportunity.
Sporty driving style: slip on traction wheels,
high lateral acceleration (drifting).
When the tire inflation pressure in all four
tires is correct, the flat tire monitor may not
have been initialized. In this case, initialize
the system.
▷
When driving with snow chains.
Changing wheels/tires
Possible driving distance with a flat tire
General information
The possible driving distance which may be
safely traveled varies depending on how the
vehicle is loaded and used, e.g., speed, road
conditions, outside temperature. The distance
traveled may be less but may also be more if
an economical driving style is used.
When using run-flat tires or a tire repair set,
wheels do not always need to be changed im-
mediately if the vehicle has broken down be-
cause the flat tire has caused a tire pressure
loss.
If the vehicle is loaded with an average
weight and used under favorable conditions,
the possible distance traveled may be up to
50 miles/80 km.
If necessary, a suitable wheel change tool, e.g.,
a jack, is available as an accessory from an
authorized service center or another qualified
service center or repair shop.
Vehicle handling with damaged tires
Safety information
Vehicles driven with a damaged tire will han-
dle differently, potentially leading to conditions
such as the following:
Warning
The jack is only provided for short-term lifting
of the vehicle for wheel changes. Even if all
safety precautions are observed, there is a
risk of the raised vehicle falling if the jack tips
over. There is a risk of injury or danger to life.
When the vehicle is raised with the jack, do
not lie under the vehicle and do not switch on
the drive-ready state.
▷
▷
▷
Greater likelihood of skidding of the vehicle.
Longer braking distances.
Changed self-steering properties.
Modify your driving style. Avoid abrupt steering
or driving over obstacles, for instance curbs or
potholes.
System limits
The system may be delayed or malfunction in
the following situations:
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Wheels and tires
MOBILITY
or risk of damage to property. When cranking
up the jack, ensure that it is inserted in the
jacking point next to the wheel well.
Warning
Placing supports, e.g., wooden blocks or sim-
ilar, under the jack may reduce its ability to
bear weight because of the limited height.
The load-carrying capacity of the wooden
blocks may be exceeded and the vehicle may
tip over. There is a risk of injury or danger to
life. Do not place supports under the jack.
Warning
A vehicle that is raised on a jack may fall
off of the jack if lateral forces are exerted on
it. There is a risk of injury and risk of dam-
age to property. While the vehicle is raised,
do not exert lateral effort on the vehicle or
pull abruptly on the vehicle. Have a stuck
wheel removed by an authorized service cen-
ter or another qualified service center or re-
pair shop.
Warning
The jack, issued by the vehicle manufacturer,
is provided in order to perform a wheel
change in the event of a breakdown. The
jack is not designed for frequent use, e.g.,
changing from summer to winter tires. Using
the jack frequently may cause it to become
jammed or damaged. There is a risk of injury
and risk of damage to property. Only use the
jack to change an emergency or spare wheel
in the event of a breakdown.
NOTICE
Using an impact wrench to loosen or tighten
the wheel lock bolt can damage the wheel
lock bolt. There is a risk of damage to prop-
erty. Only use a lug wrench to loosen and
tighten the wheel lock bolt.
Warning
Securing the vehicle against rolling
away
The jack may slip on soft, uneven, or slippery
ground, e.g., snow, ice, tiles, etc. There is a
risk of injury. If possible, change the wheel on
a flat, solid, slip-resistant surface.
General information
The vehicle manufacturer recommends to ad-
ditionally secure the vehicle against rolling
away when changing a wheel.
Warning
The jack is optimized for lifting the vehicle
and for the jacking points on the vehicle only.
There is a risk of injury. Do not lift any other
vehicle or cargo using the jack.
Warning
When the jack is not inserted into the jacking
point provided for this purpose, the vehicle
may be damaged or the jack may slip when
it is being cranked up. There is a risk of injury
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Wheels and tires
MOBILITY
▷
In the cargo area under the cargo floor
panel.
On a level surface
▷
▷
In the cargo area on the left or right side.
In the cargo area behind a side trim panel.
Place chocks or other suitable objects in front
and behind the wheel that is diagonal to the
wheel being changed.
▷
▷
Lug lock bolt, arrow 1.
Adapter, arrow 2.
On a slight downhill gradient
Unscrewing
1. Attach the adapter to the lug lock bolt.
2. Unscrew the lug lock bolt.
3. Remove the adapter after unscrewing the
lug bolt.
Screwing on
If it is necessary to change a wheel on a slight
downhill gradient, place chocks and other suit-
able objects, e.g., rocks, under the wheels of
the front and rear axles, against the direction
that the vehicle will move.
1. Attach the adapter to the lug lock bolt. Turn
the adapter until it fits onto the wheel lock
bolt.
2. Screw on the lug lock bolt. The tightening
torque is 101 lbs ft/140 Nm.
3. Remove the adapter and stow it after
screwing on the lug bolt.
Lug bolt lock
Principle
Safety precautions
The wheel lug bolts have a special coding. The
lug bolts can only be released with the adapter
which matches the coding.
▷
Park the vehicle on solid and non-slip
ground at a safe distance from road traffic.
▷
▷
▷
Turn on the hazard warning system.
Set the parking brake.
Overview
Turn the steering wheel until the front
wheels are in the straight-ahead position
and engage the steering wheel lock.
Depending on vehicle equipment, store the lug
bolt lock adapter as follows:
▷
Engage a gear or move the selector lever to
position P.
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Wheels and tires
MOBILITY
▷
As soon as permitted by the traffic flow,
have all vehicle occupants get out and
make sure that they remain outside the
hazardous area such as behind a guardrail.
1. Hold the vehicle jack with one hand, ar-
row 1, and grasp the jack crank handle or
lever with your other hand, arrow 2.
▷
▷
If necessary, set up the hazard triangle or
hazard warning lights at an appropriate
distance.
Depending on vehicle equipment, remove
the wheel change set and, if necessary, the
emergency wheel from the vehicle.
▷
▷
Secure the vehicle additionally against roll-
ing away.
Loosen the lug bolts a half turn.
2. Insert the jack into the rectangular recess of
the jacking point closest to the wheel to be
changed.
Jacking points
3. Extend the jack by turning the jack crank
handle or lever clockwise.
The jacking points are located at the indicated
positions.
Jacking up the vehicle
Warning
Hands and fingers can be jammed when us-
ing the jack. There is a risk of injury. Comply
with the described hand position and do not
change this position while using the jack.
4. Take your hand away from the jack as soon
as the jack is under load and continue turn-
ing the jack crank handle or lever with one
hand.
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Wheels and tires
MOBILITY
5. Make sure that the car jack foot extends
vertically and is at a right angle beneath the
jacking point.
3. Check tire inflation pressure at the next op-
portunity and correct as needed.
4. Re-initialize the flat tire monitor or reset the
Tire Pressure Monitor.
5. Check to make sure the lug bolts are tight
with a calibrated torque wrench.
6. Drive to the nearest authorized service cen-
ter or another qualified service center or
repair shop, then have the damaged tire
replaced.
6. Crank the vehicle up until the entire jack
surface is on the ground and the cor-
responding wheel is lifted max. 1.2 in-
ches/3 cm above the ground.
Mounting a wheel
Mount one emergency wheel only, as required.
1. Unscrew the lug bolts.
2. Remove the wheel.
3. Put the new wheel or emergency wheel on
and screw in at least two lug bolts in a
crosswise pattern until hand-tight.
When non-original light-alloy wheels of the
vehicle manufacturer are mounted, the ac-
companying lug bolts may have to be used
as well.
4. Hand-tighten the remaining lug bolts and
tighten all lug bolts well in a crosswise pat-
tern.
5. Turn the jack crank handle counterclock-
wise to retract the jack and lower the vehi-
cle.
6. Remove the jack and stow it securely.
After the wheel change
1. Tighten the lug bolts crosswise. The tight-
ening torque is 101 lbs ft/140 Nm.
2. Stow the faulty wheel in the cargo area, if
necessary.
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