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EnglishMOBILITY -> Wheels and tires for your BMW 7 Series 2015-2021
Wheels and tires
MOBILITY
Wheels and tires
Tire inflation pressure
specifications
Vehicle features and
options
In the tire inflation pressure table
The tire inflation pressure table, refer to
page 330, contains all tire inflation pressure
specifications for the specified tire sizes at the
ambient temperature. The tire inflation pressure
values apply to tire sizes approved by the manu‐
facturer of the vehicle for the vehicle type.
This chapter describes all standard, country-spe‐
cific and optional features offered with the series.
It also describes features and functions that are
not necessarily available in your vehicle, e.g., due
to the selected options or country versions. This
also applies to safety-related functions and sys‐
tems. When using these functions and systems,
the applicable laws and regulations must be ob‐
served.
To identify the correct tire inflation pressure,
please note the following:
▷ Tire sizes of your vehicle.
▷ Maximum permitted driving speed.
Tire inflation pressure
On the Control Display
General information
The tire characteristics and tire inflation pressure
influence the following:
The current tire inflation pressure values and the
intended tire inflation pressure values for the
mounted tires can be displayed on the Control
Display.
▷ The service life of the tires.
▷ Road safety.
To ensure that they are displayed correctly, the
tire sizes must be stored in the system and must
have been set, refer to page 343, for the
mounted tires.
▷ Driving comfort.
▷ Fuel consumption.
The current tire inflation pressure value is lo‐
cated on each tire.
Safety information
The reference tire inflation pressure value is lo‐
cated in the lower area of the Control Display.
Warning
A tire with too little or no tire inflation pressure
may heat up significantly and sustain damage.
This will have a negative impact on aspects of
handling, such as steering and braking re‐
sponse. There is a risk of accident. Regularly
check the tire inflation pressure, and correct it
as needed, for instance twice a month and be‐
fore a long trip.
Checking the tire inflation
pressure
General information
Tires heat up while driving. The tire inflation
pressure increases with the tire temperature.
Tires have a natural, consistent loss of tire infla‐
tion pressure.
The displays of inflation devices may under-read
by up to 0.1 bar/2 psi.
328
Wheels and tires
MOBILITY
Checking using tire inflation
pressure specifications in the tire
inflation pressure table
After correcting the tire inflation
pressure
With runflat tires:
The tire inflation pressure specifications in the
tire inflation pressure table only relate to cold
tires or tires at the same temperature as the am‐
bient temperature.
Reinitialize the Flat Tire Monitor.
With Tire Pressure Monitor TPM:
The corrected tire inflation pressures are applied
automatically. Make sure that the correct tire set‐
tings have been made.
Only check the tire inflation pressure levels when
the tires are cold, i.e.:
With tires that cannot be found in the tire pres‐
sure values on the Control Display, reset the Tire
Pressure Monitor TPM.
▷ Driving range of max. 1.25 miles/2 km has not
been exceeded.
▷ If the vehicle has not moved again for at least
2 hours after a trip.
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, note the pressure val‐
ues in the tire inflation pressure table, refer to
page 330, and adjust as necessary.
Check the tire inflation pressure of the emer‐
gency wheel in the cargo area regularly, and cor‐
rect it as needed.
1. Determine, refer to page 328, the intended
tire inflation pressure levels for the mounted
tires.
2. Check the tire inflation pressure in all four
tires, using a pressure gage, for example.
3. Correct the tire inflation pressure if the cur‐
rent tire inflation pressure value deviates from
the specified value.
4. Check whether all valve caps are screwed
onto the tire valves.
These pressure values can also be found on the
tire inflation pressure label on the driver's door
pillar.
Checking using the tire inflation
pressure specifications on the
Control Display
Via iDrive:
Do not exceed a speed of 100 mph/160 km/h.
1. "CAR"
2. "Vehicle status"
3.
"Tire Pressure Monitor"
4. Check whether the current tire inflation pres‐
sure levels deviate from the intended tire
pressure value.
5. Correct the tire inflation pressure if the cur‐
rent tire inflation pressure value deviates from
the intended value.
329
Wheels and tires
MOBILITY
Tire inflation pressure values up
to 100 mph/160 km/h
Tire size
Pressure specifica‐
tions in bar/PSI
Rear: 275/30 R 21
98 Y XL RSC
-
3.0 / 44
740Li, 740Li xDrive, 750i xDrive,
750Li xDrive
Emergency wheel: Speed up to a max. of
50 mph / 80 km/h
Tire size
Pressure specifica‐
tions in bar/PSI
T 135/80 R 18 104
M
4.2 / 60
Specifications in
bar/PSI with cold
tires
M760Li xDrive
Tire size
Pressure specifica‐
tions in bar/PSI
245/50 R 18 100 V 2.2 / 32
M+S A/S RSC
2.4 / 35
2.6 / 38
Specifications in
bar/PSI with cold
tires
245/50 R 18 100 H
M+S RSC
245/45 R 19 102 V 2.4 / 35
M+S XL A/S RSC
245/45 R 19 102 V 2.4 / 35
M+S XL A/S RSC
2.6 / 38
245/45 R 19 102 V
M+S XL RSC
245/45 R 19 102 V
M+S XL RSC
Front: 245/45 R 19 2.5 / 36
98 Y RSC
-
Front: 245/40 R 20 2.7 / 39
99 Y XL RSC
-
Rear: 275/40 R 19
101 Y RSC
-
2.5 / 36
Rear: 275/35 R 20
102 Y XL RSC
-
2.7 / 39
Front: 245/40 R 20 2.9 / 42
99 Y XL RSC
-
Front: 245/40 R 20 2.7 / 39
99 V M+S XL RSC
-
Rear: 275/35 R 20
102 Y XL RSC
-
3.1 / 45
-
Rear: 275/35 R 20
102 V M+S XL RSC
-
2.7 / 39
-
Front: 245/40 R 20 2.7 / 39
99 V M+S XL RSC
Front: 245/40 ZR
20 99 Y XL Std
2.7 / 39
-
Rear: 275/35 R 20
102 V M+S XL
RSC
-
2.7 / 39
Rear: 275/35 ZR 20
102 Y XL Std
2.7 / 39
Front: 245/35 R 21 3.0 / 44
96 Y XL RSC
-
330
Wheels and tires
MOBILITY
Tire inflation pressures at max.
speeds above 100 mph/160 km/h
Tire size
Pressure specifica‐
tions in bar/PSI
Front: 245/40 R 20 2.9 / 42
99 Y XL RSC
-
Warning
In order to drive at maximum speeds in excess
of 100 mph/160 km/h, please observe, and, if
necessary, adjust tire pressures for speeds ex‐
ceeding 100 mph/160 km/h from the relevant
table on the following pages. Otherwise, tire
damage and accidents could occur.
Rear: 275/35 R 20
102 Y XL RSC
-
3.1 / 45
-
Front: 245/40 R 20 3.0 / 44
99 V M+S XL RSC
Rear: 275/35 R 20
102 V M+S XL
RSC
-
3.0 / 44
For speeds over 100 mph/160 km/h and for opti‐
mum driving comfort, note the pressure values in
the tire inflation pressure table, refer to
Front: 245/35 R 21 3.0 / 44
96 Y XL RSC
-
page 331, and adjust as necessary.
Rear: 275/30 R 21
98 Y XL RSC
-
3.0 / 44
Tire inflation pressure values
over 100 mph/160 km/h
Emergency wheel: Speed up to a max. of
50 mph / 80 km/h
T 135/80 R 18 104
M
740Li, 740Li xDrive, 750i xDrive,
750Li xDrive
4.2 / 60
Without high-speed tuning feature
With high-speed tuning feature
Tire size
Pressure specifica‐
tions in bar/PSI
Tire size
Pressure specifications
in bar/PSI
Specifications in
bar/PSI with cold
tires
Specifications in
bar/PSI with cold
tires
245/50 R 18 100 V 2.5 / 36
M+S A/S RSC
2.7 / 39
2.9 / 42
245/50 R 18 100 2.5 / 36
H M+S RSC
2.7 / 39
3.1 / 45
-
245/50 R 18 100 H
M+S RSC
245/45 R 19 102 2.9 / 42
V M+S XL RSC
245/45 R 19 102 V 2.7 / 39
M+S XL A/S RSC
Front:
2.7 / 39
245/45 R 19 98 Y
RSC
245/45 R 19 102 V
M+S XL RSC
Rear: 275/40 R 19
101 Y RSC
-
2.7 / 39
Front: 245/45 R 19 2.5 / 36
98 Y RSC
-
Rear: 275/40 R 19
101 Y RSC
-
2.5 / 36
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Wheels and tires
MOBILITY
Tire size
Pressure specifications
in bar/PSI
Tire size
Pressure specifica‐
tions in bar/PSI
Front:
245/40 R 20 99 Y
XL RSC
2.9 / 42
-
Front: 245/40 R 20 3.0 / 44
99 V M+S XL RSC
-
Rear: 275/35 R 20
102 V M+S XL RSC
-
3.0 / 44
-
Rear: 275/35 R 20
102 Y XL RSC
-
3.1 / 45
-
Front: 245/40 ZR
20 99 Y XL Std
2.7 / 39
-
Front: 245/40 R
20 99 V M+S XL
RSC
3.3 / 48
Rear: 275/35 ZR 20
102 Y XL Std
2.7 / 39
Rear: 275/35 R 20
102 V M+S XL
RSC
-
3.3 / 48
With high-speed tuning feature
Tire size
Pressure specifica‐
tions in bar/PSI
Front:
245/35 R 21 96
Y XL RSC
3.3 / 48
-
Specifications in
bar/PSI with cold
tires
Rear: 275/30 R 21
98 Y XL RSC
-
3.3 / 48
Emergency wheel: Speed up to a max. of
245/45 R 19 102 V 2.9 / 42
M+S XL RSC
3.1 / 45
50 mph / 80 km/h
T 135/80 R 18
104 M
4.2 / 60
Front: 245/40 R 20 3.0 / 44
99 Y XL RSC
-
M760Li xDrive
Without high-speed tuning feature
Rear: 275/35 R 20
102 Y XL RSC
-
3.0 / 44
-
Tire size
Pressure specifica‐
tions in bar/PSI
Front: 245/40 R 20 3.3 / 48
99 V M+S XL RSC
Specifications in
bar/PSI with cold
tires
Rear: 275/35 R 20
102 V M+S XL
RSC
-
3.3 / 48
Front: 245/40 ZR
20 99 Y XL Std
3.0 / 44
-
-
245/45 R 19 102 V 2.7 / 39
M+S XL A/S RSC
2.9 / 42
Rear: 275/35 ZR
20 102 Y XL Std
3.0 / 44
245/45 R 19 102 V
M+S XL RSC
Front: 245/40 R 20 2.7 / 39
99 Y XL RSC
-
With M Driver’s Package
Rear: 275/35 R 20
102 Y XL RSC
-
2.7 / 39
332
Wheels and tires
MOBILITY
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
Specifications in
bar/PSI with cold
tires
Speed letter
Q = up to 100 mph/160 km/h
R = up to 106 mph/170 km/h
S = up to 112 mph/180 km/h
T = up to 118 mph/190 km/h
H = up to 131 mph/210 km/h
V = up to 150 mph/240 km/h
W = up to 167 mph/270 km/h
Y = up to 186 mph/300 km/h
245/45 R 19 102 2.9 / 42
V M+S XL RSC
3.1 / 45
-
Front: 245/40 R 3.3 / 48
20 99 V M+S XL
RSC
Rear: 275/35 R
20 102 V M+S
XL RSC
-
3.3 / 48
Tire Identification Number
DOT code: DOT xxxx xxx 0119
xxxx: manufacturer code for the tire brand
xxx: tire size and tire design
Front: 245/40
ZR 20 99 Y XL
Std
3.4 / 49
-
Rear: 275/35 ZR
20 102 Y XL Std
-
3.4 / 49
0119: tire age
Tires with DOT codes meet the guidelines of the
U.S. Department of Transportation.
Tire identification marks
Tire age
Tire size
245/45 R 18 96 Y
Recommendation
Regardless of the tire tread, replace tires at least
every 6 years.
245: nominal width in mm
45: aspect ratio in %
Manufacture date
R: radial tire code
You can find the manufacture date of the tire on
the tire's sidewall.
18: rim diameter in inches
96: load rating, not for ZR tires
Y: speed rating, before the R on ZR tires
Designation
Manufacture date
DOT … 0119
1st week, 2019
Maximum tire load
Maximum tire load is the maximum permissible
weight for which the tire is approved.
Uniform Tire Quality Grading
Quality grades can be found where applicable on
the tire sidewall between tread shoulder and
maximum section width.
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
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Wheels and tires
MOBILITY
E.g.: Treadwear 200; Traction AA; Temperature
A
high temperature can cause the material of the
tire to degenerate and reduce tire life, and exces‐
sive temperature can lead to sudden tire failure.
The grade C corresponds to a level of perform‐
ance which all passenger car tires must meet un‐
der 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.
DOT Quality Grades
Treadwear
Traction AA A B C
Temperature A B C
All passenger vehicle tires must conform to Fed‐
eral Safety Requirements in addition to these
grades.
Warning
The temperature grade for this tire is estab‐
lished for a tire that is properly inflated and not
overloaded. Excessive speed, underinflation, or
excessive loading, either separately or in com‐
bination, can cause heat buildup and possible
tire failure.
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, however, and
may depart significantly from the norm due to
variations in driving habits, service practices and
differences in road characteristics and climate.
RSC – Run-flat tires
Run-flat tires, refer to page 337, are labeled with
a circular symbol containing the letters RSC
marked on the sidewall.
M+S
Traction
Winter and all-season tires with better cold
weather performance than summer tires.
The traction grades, from highest to lowest, are
AA, A, B, and C.
Those grades represent the tire's ability to stop
on wet pavement as measured under controlled
conditions on specified government test surfa‐
ces of asphalt and concrete. A tire marked C may
have poor traction performance.
Tire tread
Summer tires
Do not drive with a tire tread of less than
0.12 in/3 mm, otherwise there is an increased
risk of hydroplaning.
The traction grade assigned to this tire is based
on straight-ahead braking traction tests, and
does not include acceleration, cornering, hydro‐
planing, or peak traction characteristics.
Winter tires
Do not drive with a tire tread of less than
0.16 in/4 mm, as such tires are less suitable for
winter operation.
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
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Wheels and tires
MOBILITY
▷ Tire inflation pressure too low.
▷ Vehicle overloading.
Minimum tread depth
▷ Incorrect tire storage.
Safety information
Warning
Damaged tires can lose tire inflation pressure,
which can lead to loss of vehicle control. There
is a risk of accident. If tire damage is suspected
while driving, immediately reduce speed and
stop. Have wheels and tires checked. For this
purpose, drive carefully to the nearest dealer’s
service center or another qualified service cen‐
ter or repair shop. Have vehicle towed or trans‐
ported as needed. Do not repair damaged tires,
but have them replaced.
Wear indicators are distributed around the tire's
circumference and have the legally required min‐
imum height of 0.063 inches/1.6 mm.
The positions of the wear indicators are marked
on the tire sidewall with TWI, Tread Wear Indica‐
tor.
Tire damage
Warning
Tires can become damaged by driving over ob‐
stacles, e.g., curbs or road damage, at high
speed. Larger wheels have a smaller tire cross-
section. The smaller the tire cross-section, the
higher the risk of tire damage. There is a dan‐
ger of accidents and property damage. If possi‐
ble, avoid driving over objects or road condi‐
tions that may damage tires, or drive over them
slowly and carefully.
General information
Inspect your tires regularly for damage, foreign
objects lodged in the tread, and tread wear.
Driving over rough or damaged road surfaces, as
well as debris, curbs and other obstacles can
cause serious damage to wheels, tires and sus‐
pension parts. This is more likely to occur with
low-profile tires, which provide less cushioning
between the wheel and the road. Be careful to
avoid road hazards and reduce your speed, es‐
pecially if your vehicle is equipped with low-pro‐
file tires.
Changing wheels and tires
Indications of tire damage or other vehicle mal‐
functions:
Mounting and wheel balancing
Have mounting and wheel balancing carried out
by a dealer’s service center or another qualified
service center or repair shop.
▷ Unusual vibrations.
▷ Unusual tire or running noises.
▷ Unusual handling such as a strong tendency
to pull to the left or right.
Damage can be caused by the following situa‐
tions, for instance:
▷ Driving over curbs.
▷ Road damage.
335
Wheels and tires
MOBILITY
combination remounted on the vehicle as soon
as possible.
Wheel and tire combination
General information
You can ask the dealer's service center or an‐
other qualified service center or repair shop
about the correct wheel/tire combination and
wheel rim versions for the vehicle.
Recommended tire brands
Safety information
Warning
Wheels and tires which are not suitable for your
vehicle can damage parts of the vehicle, for in‐
stance due to contact with the body due to tol‐
erances despite the same official size rating.
There is a risk of an accident. The manufac‐
turer of your vehicle strongly suggests that you
use wheels and tires that have been recom‐
mended by the vehicle manufacturer for your
vehicle type.
For each tire size, the manufacturer of the vehi‐
cle recommends certain tire brands. The tire
brands can be identified by a star on the tire
sidewall.
New tires
Tire traction is not optimal due to manufacturing
circumstances when tires are brand-new; they
achieve their full traction potential after a break-in
time.
Warning
Mounted steel wheels can cause technical
problems, for instance independent loosening
of the lug bolts, damage to the brake discs.
There is a risk of accident. Do not mount steel
wheels.
Drive conservatively for the first
200 miles/300 km.
Retreaded tires
Warning
Warning
Retreaded tires can have different tire casing
structures. With advanced age the service life
can be limited. There is a risk of an accident.
The manufacturer of your vehicle does not rec‐
ommend the use of retreaded tires.
Incorrect wheel/tire combinations will have a
negative impact on the vehicle's handling and
on the function of a variety of systems, such as
the Anti-lock Brake System or Dynamic Stabil‐
ity Control. There is a risk of accident. To main‐
tain good handling and vehicle response, use
only tires with a single tread configuration from
a single manufacturer. The manufacturer of the
vehicle recommends that you use wheels and
tires that have been recommended by the vehi‐
cle manufacturer for your vehicle type. Follow‐
ing tire damage, have the original wheel/tire
The manufacturer of the vehicle does not rec‐
ommend the use of retreaded tires.
336
Wheels and tires
MOBILITY
Winter tires
Storing tires
General information
Tire inflation pressure
Winter tires are recommended for operating on
winter roads.
Do not exceed the maximum tire inflation pres‐
sure indicated on the side wall of the tire.
Although so-called all-season M+S tires provide
better winter traction than summer tires, they
usually do not provide the same level of perform‐
ance as winter tires.
Storage
Store wheels and tires in a cool, dry and dark
place.
Always protect tires against all contact with oil,
grease, and solvents.
Maximum speed of winter tires
If the maximum speed of the vehicle is higher
than the permissible speed for the winter tires,
then attach a label showing the permissible maxi‐
mum speed in the field of view. The label is avail‐
able from a dealer's service center or another
qualified service center or repair shop.
Do not leave tires in plastic bags.
Remove dirt from wheels or tires.
Run-flat tires
With winter tires mounted, observe and do not
exceed the permissible maximum speed.
Concept
Run-flat tires permit continued driving under re‐
stricted conditions even in the event of a com‐
plete loss of tire inflation pressure.
Changing runflat tires
For your own safety, use only runflat tires. No
spare tire is available in the case of a flat tire. Fur‐
ther information is available from a dealer's serv‐
ice center or another qualified service center or
repair shop.
General information
The wheels consist of tires that are self-support‐
ing, to a limited degree, and possibly special
rims.
Rotating wheels between axles
The support of the sidewall allows the tire to re‐
main drivable to a restricted degree in the event
of a tire inflation pressure loss.
Different wear patterns can occur on the front
and rear axles depending on individual driving
conditions. The tires can be rotated in pairs be‐
tween the axles to achieve even wear. Further in‐
formation is available from a dealer's service cen‐
ter or another qualified service center or repair
shop. After rotating, check the tire pressure and
correct, if needed.
Follow the instructions for continued driving with
a flat tire.
Safety information
Warning
Rotating the tires is not permissible on vehicles
with different tire sizes or rim sizes on the front
and rear axles.
Your vehicle handles differently with a run-flat
tire with no or low inflation pressure; for in‐
stance, your lane stability when braking is re‐
duced, braking distances are longer and the
self-steering properties will change. There is a
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Wheels and tires
MOBILITY
risk of accident. Drive moderately and do not
exceed a speed of 50 mph/80 km/h.
To accomplish this, sealant is pumped into the
tires, which seals the damage from the inside.
General information
▷ Follow the instructions on using the Mobility
System found on the compressor and sealant
container.
Label
▷ Use of the Mobility System may be ineffec‐
tive if the tire puncture measures approx.
1/8 inches/4 mm or more.
▷ Contact a dealer's service center or another
qualified service center or repair shop if the
tire cannot be made drivable.
▷ If possible, do not remove foreign bodies that
have penetrated the tire. Only remove foreign
objects if they are visibly protruding from the
tire.
The tires are marked on the tire sidewall with
RSC Run-flat System Component.
▷ Pull the speed limit sticker off the sealant
container and apply it to the steering wheel.
Repairing a flat tire
▷ The use of a sealant can damage the TPM
wheel electronics. In this case, have the elec‐
tronics checked and replaced at the next op‐
portunity.
Safety measures
▷ Park the vehicle as far away as possible from
passing traffic and on solid ground.
▷ The compressor can be used to check the
tire inflation pressure.
▷ Switch on the hazard warning system.
▷ Secure the vehicle against rolling away by
setting the parking brake.
Overview
Storage
▷ Turn the steering wheel until the front wheels
are in the straight-ahead position and engage
the steering wheel lock.
▷ Have all vehicle occupants get out of the ve‐
hicle and ensure that they remain outside the
immediate area in a safe place, such as be‐
hind a guardrail.
▷ If necessary, set up a warning triangle at an
appropriate distance.
Mobility System
The Mobility System is in the left storage com‐
partment of the cargo area.
Concept
With the Mobility System, minor tire damage can
be sealed temporarily to enable continued travel.
338
Wheels and tires
MOBILITY
▷ Turn the steering wheel until the front wheels
are in the straight-ahead position and engage
the steering wheel lock.
Sealant container
▷ Have all vehicle occupants get out of the ve‐
hicle and ensure that they remain outside the
immediate area in a safe place, such as be‐
hind a guardrail.
▷ If necessary, set up a warning triangle at an
appropriate distance.
Filling the tire with sealant
Safety information
▷ Sealant container, arrow 1.
▷ Filling hose, arrow 2.
Observe use-by date on the sealant container.
DANGER
Compressor
If the exhaust pipe is blocked or ventilation is in‐
sufficient, harmful exhaust gases can enter into
the vehicle. The exhaust gases contain pollu‐
tants which are colorless and odorless. In en‐
closed areas, exhaust gases can also accumu‐
late outside of the vehicle. There is danger to
life. Keep the exhaust pipe free and ensure suf‐
ficient ventilation.
1
2
3
4
5
6
7
8
Sealant container unlocking
Sealant container holder
Tire pressure gage
NOTICE
The compressor can overheat during extended
operation. There is a risk of damage to prop‐
erty. Do not run the compressor for more than
10 minutes.
Reduce tire inflation pressure button
On/off switch
Compressor
Filling
1. Shake the sealant container.
Connector/cable for socket
Connection hose
Safety measures
▷ Park the vehicle as far away as possible from
passing traffic and on solid ground.
▷ Switch on the hazard warning system.
▷ Secure the vehicle against rolling away by
setting the parking brake.
339
Wheels and tires
MOBILITY
2. Pull filling hose completely out of the cover of
the sealant container. Do not kink the hose.
5. With the compressor switched off, insert the
plug into the power socket inside the vehicle.
3. Slide the sealant container into the holder on
the compressor housing, ensuring that it en‐
gages audibly.
6. With standby state switched on or the engine
running, switch on the compressor.
Let the compressor run for max. 10 minutes to fill
the tire with sealant and achieve a tire inflation
pressure of approx. 2.0 bar.
4. Screw the filling hose of the sealant container
onto the tire valve of the nonworking wheel.
While the tire is being filled with sealant, the tire
inflation pressure may sporadically reach approx.
5 bar. Do not switch off the compressor at this
point.
Checking and adjusting the tire
inflation pressure
Checking
1. Switch off the compressor.
2. Read the tire inflation pressure on the tire
pressure gage.
To continue the trip, a tire inflation pressure of at
least 2 bar must be reached.
340
Wheels and tires
MOBILITY
center or another qualified service center or
repair shop.
Removing and stowing the sealant
container
If a tire inflation pressure of at least 2 bar is
reached, see Minimum tire inflation pressure
is reached.
1. Unscrew the filling hose of the sealant con‐
tainer from the tire valve.
2. Press the red unlocking device.
6. Unscrew the connection hose of the com‐
pressor from the tire valve.
3. Remove the sealant container from the com‐
pressor.
7. Pull the connector out of the power socket
inside the vehicle.
4. Wrap and store the sealant container in suita‐
ble material to avoid dirtying the cargo area.
8. Stow the Mobility System in the vehicle.
Minimum tire inflation pressure is
not reached
1. Pull the connector out of the power socket
inside the vehicle.
Minimum tire inflation pressure is
reached
1. Unscrew the connection hose of the com‐
pressor from the tire valve.
2. Drive 33 ft/10 m forward and back to distrib‐
ute the sealant in the tire.
2. Pull the connector out of the power socket
inside the vehicle.
3. Screw the connection hose of the compres‐
sor directly onto the tire valve stem.
3. Stow the Mobility System in the vehicle.
4. Immediately drive approx. 5 miles/10 km to
ensure that the sealant is evenly distributed in
the tire.
Do not exceed a speed of 50 mph/80 km/h.
If possible, do not drive at speeds less than
12 mph/20 km/h.
Adjustment
1. Stop at a suitable location.
4. Insert the connector into the power socket in‐
side the vehicle.
2. Screw the connection hose of the compres‐
sor directly onto the tire valve stem.
5. With standby state switched on or the engine
running, switch on the compressor.
If a tire inflation pressure of at least 2 bar can‐
not be reached, contact your dealer's service
341
Wheels and tires
MOBILITY
3. Insert the connector into the power socket in‐
side the vehicle.
Snow chains
Safety information
Warning
With the mounting of snow chains on unsuita‐
ble tires, the snow chains can come into con‐
tact with vehicle parts. There may be a risk of
accident or risk of damage to property. Only
mount snow chains on tires that are designated
by their manufacturer as suitable for the use of
snow chains.
4. Correct the tire inflation pressure to at least
2.0 bar.
▷ Increase tire inflation pressure: with
standby state switched on or the engine
running, switch on the compressor.
Warning
Insufficiently tight snow chains may damage
tires and vehicle components. There may be a
risk of accident or risk of damage to property.
Make sure that the snow chains are always suf‐
ficiently tight. Re-tighten as needed according
to the snow chain manufacturer's instructions.
▷ Reduce tire inflation pressure: press the
button on the compressor.
5. Unscrew the connection hose of the com‐
pressor from the tire valve.
6. Pull the connector out of the power socket
inside the vehicle.
7. Stow the Mobility System in the vehicle.
Fine-link snow chains
Continuing the trip
Do not exceed the maximum permissible speed
of 50 mph/80 km/h.
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 recommended
as road-safe and suitable.
Reinitialize the run-flat tires, refer to page 350.
Reset the Tire Pressure Monitor TPM, refer to
page 343.
Information regarding suitable snow chains is
available from a dealer’s service center or an‐
other qualified service center or repair shop.
Replace the nonworking tire and the sealant con‐
tainer of the Mobility System promptly.
Use
Use only in pairs on the rear wheels, equipped
with the tires of the following size:
▷ 245/50 R 18.
▷ 245/45 R 19.
Follow the snow chain manufacturer's instruc‐
tions.
342
Wheels and tires
MOBILITY
Do not initialize the Flat Tire Monitor after
mounting snow chains, as doing so may result in
incorrect readings.
4. "Tire chains"
5. "Snow chains installed"
Starting with the permissible maximum speed
with snow chains of 30 mph/50 km/h the rear
axle steering will be switched on again automati‐
cally.
Do not reset the Tire Pressure Monitor TPM af‐
ter mounting snow chains, as doing so may re‐
sult in incorrect readings.
When driving with snow chains, briefly activate
Dynamic Traction Control DTC to optimize the
forward momentum.
Tire Pressure Monitor TPM
Maximum speed with snow
chains
Do not exceed a speed of 30 mph/50 km/h when
using snow chains.
Concept
The system monitors tire inflation pressure in the
four mounted tires. The system warns you if
there is a loss of pressure in one or more tires.
Rear axle steering during
operation with snow chains
General information
Sensors in the tire valves measure the tire infla‐
tion pressure and tire temperature.
General information
Using the tire settings in iDrive, the system can
automatically display the specified target pres‐
sures and compare them with the actual tire in‐
flation pressures.
In order to guarantee free running of the wheels
when operating with snow chains, rear axle
steering of the integral active steering must be
switched off when snow chains are mounted.
If tires are being used that are not specified on
the tire inflation pressure details on the vehicle,
refer to page 328, such as tires with special ap‐
proval, the system needs to be actively reset.
The system will then take over the actual tire in‐
flation pressures as the target pressures.
Safety information
Warning
When rear axle steering is switched on and
snow chains are mounted, there can be contact
between snow chains and the chassis. There
may be a risk of accident or risk of damage to
property. With mounted snow chains, switch off
the rear axle steering.
When operating the system, also note the addi‐
tional information found in the Tire inflation pres‐
sure, refer to page 328, chapter.
Safety information
Warning
Switching off rear axle steering
The display of the target pressures is not a
substitute for the tire inflation pressure details
on the vehicle. Incorrect entries in the tire set‐
tings can lead to incorrect target tire inflation
pressure values. In this case, it cannot be guar‐
anteed that the notification of a loss of tire infla‐
tion pressure will be reliable. There is a risk of
injury and risk of damage to property. Ensure
The rear axle steering is switched off by specify‐
ing that snow chains are installed.
Via iDrive:
1. "CAR"
2. "Settings"
3. "General settings"
343
Wheels and tires
MOBILITY
that the tire sizes of the mounted tires are dis‐
played correctly and match the details on the
tires and on the vehicle.
Changing settings
Via iDrive:
1. "Tire settings"
2. "Tire selection"
3. "Manual"
Functional requirements
The following conditions must be met for the
system; otherwise, reliable flagging of a loss of
tire inflation pressure is not assured:
4.
▷ "Summer tires"
▷ "Winter/all-year"
5. Select the tire type that is mounted on the
rear axle:
▷ Every time a tire or wheel is changed, the
correct details on the mounted tires must be
entered in the tire settings, refer to
page 344.
▷ Tire size, e.g., 245/45 R18 96 Y.
▷ For tires with special approval: "Other tire"
▷ For tires with special approval:
6. Select the maximum road speed that will be
used with the tires.
▷ After a tire or wheel replacement, a reset
was performed with the correct tire infla‐
tion pressure.
7. "Save tire settings"
The measurement of the current tire inflation
pressure is started. The measurement progress
is displayed.
▷ After the tire inflation pressure was ad‐
justed to a new value, a reset was per‐
formed.
▷ Wheels with TPM wheel electronics.
Status display
Current status
Tire settings
The system status can be displayed on the Con‐
trol Display, e.g., whether or not the system is ac‐
tive.
General information
The tire sizes of the mounted tires can be gath‐
ered from the tire inflation pressure details on the
vehicle, refer to page 328, or directly on the tires.
Via iDrive:
1. "CAR"
The tire details do not need to be re-entered
when the tire inflation pressure is corrected.
2. "Vehicle status"
3.
"Tire Pressure Monitor"
For summer and winter tires, the tire details en‐
tered last are stored. After a tire or wheel re‐
placement, the settings of the tire sets used last
can be selected.
The current status is displayed.
Current tire inflation pressure
The current tire inflation pressure is displayed for
each tire.
Opening the menu
Via iDrive:
The current tire inflation pressures may change
during driving operation or depending on the ex‐
ternal temperature.
1. "CAR"
2. "Vehicle status"
3.
"Tire Pressure Monitor"
Current tire temperature
Depending on the model, the current tire tem‐
peratures are displayed.
344
Wheels and tires
MOBILITY
The current tire temperatures may change while
driving or due to the external temperature.
Gray wheels
It may not be possible to identify tire inflation
pressure losses.
Target pressure
The target pressure for the tires on the front and
rear axles is displayed.
Possible causes:
▷ Malfunction.
▷ During tire inflation pressure measurement,
after confirmation of the tire settings.
The target pressures are values stored in the ve‐
hicle.
▷ For tires with special approval: the system is
being reset.
The specified target pressures take the influence
of driving operation and external temperature on
the tire temperature into account. The appropri‐
ate target pressure is always displayed, inde‐
pendent of the weather situation, tire tempera‐
tures and driving times.
For tires with special approval:
perform a reset
Via iDrive:
The displayed target pressure may change and
may differ from the tire inflation pressure details
on the door pillar of the driver's door. The tire in‐
flation pressure can thus be corrected to the
value of the displayed target pressures.
1. "CAR"
2. "Vehicle status"
3. "Tire Pressure Monitor"
4. Switch on drive-ready state and do not drive
off.
The target pressure is immediately adjusted if
the vehicle load is changed in the tire settings.
5. Reset tire inflation pressure: "Perform reset".
6. Drive away.
Tire conditions
The wheels are displayed in gray and the follow‐
ing is displayed "Resetting Tire Pressure
Monitor…".
General information
Tire and system status are indicated by the color
of the wheels and a SMS text message on the
Control Display.
After a travel time of several minutes, the set tire
inflation pressures are accepted as the target tire
inflation pressures. The reset is completed auto‐
matically while driving.
Any existing messages may not be deleted if the
displayed target pressure is not reached after the
tire inflation pressure is corrected.
After a successfully completed reset, the wheels
on the Control Display are shown in green and
the following is displayed: "Tire Pressure Monitor
active. See label for recommended pressure.".
All wheels green
▷ The system is active and bases warnings on
the displayed target pressures.
You may interrupt this trip at any time. When you
continue the reset resumes automatically.
▷ For tires with special approval: the system is
active and bases warnings on the tire inflation
pressures stored during the last reset.
Messages: for tires without
special approval
One to four yellow wheels
A flat tire or major drop in the tire inflation pres‐
sure has occurred in the indicated tires.
General information
A low tire inflation pressure may cause the DSC
Dynamic Stability Control to be switched on.
345
Wheels and tires
MOBILITY
Measure
Safety information
1. Reduce the vehicle speed. Do not exceed a
speed of 80 mph/130 km/h.
Warning
2. At the next opportunity, for instance at a gas
station, check the tire inflation pressure in all
four tires and correct if necessary.
A damaged regular tire with low or missing tire
inflation pressure impacts handling, such as
steering and braking response. Run-flat 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 infor‐
mation on run-flat tires and continued driving
with these tires.
If there is a significant loss of tire
inflation pressure
Message
A yellow warning light is illuminated in
the instrument cluster.
If a tire inflation pressure check is
required
In addition, a symbol with the affected tire ap‐
pears in a Check Control message on the Con‐
trol Display.
Message
A symbol with a Check Control message ap‐
pears on the Control Display.
Symbol Possible cause
There is a flat tire or a major loss in
tire inflation pressure.
Symbol Possible cause
Inflation was not carried out accord‐
ing to specifications, e.g., when the
tire has not been sufficiently inflated
or in the case of a natural steady 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 nor‐
mal tires or run-flat tires.
Measure
Check the tire pressure and correct as needed.
Run-flat tires, refer to page 337, are labeled
with a circular symbol containing the letters
RSC marked on the tire's sidewall.
If the tire inflation pressure is too
low
Messages: for tires with special
approval
Message
A yellow warning light is illuminated in
the instrument cluster.
General information
In addition, a symbol with a Check Control mes‐
sage appears on the Control Display.
A low tire inflation pressure may cause the DSC
Dynamic Stability Control to be switched on.
Symbol Possible cause
There is a tire inflation pressure loss.
346
Wheels and tires
MOBILITY
Safety information
If the tire inflation pressure is too
low
Warning
Message
A damaged regular tire with low or missing tire
inflation pressure impacts handling, such as
steering and braking response. Run-flat 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 infor‐
mation on run-flat tires and continued driving
with these tires.
A yellow warning light is illuminated in
the instrument cluster.
In addition, a symbol with a Check Control mes‐
sage appears on the Control Display.
Symbol Possible cause
There is a tire inflation pressure loss.
No reset was performed for the sys‐
tem. The system issues a warning
based on the tire inflation pressures
stored during the last reset.
If a tire inflation pressure check is
required
Message
A symbol with a Check Control message ap‐
pears on the Control Display.
Measure
1. Reduce the vehicle speed. Do not exceed a
speed of 80 mph/130 km/h.
Sym‐
bol
Possible cause
2. At the next opportunity, for instance at a gas
station, check the tire inflation pressure in all
four tires and correct if necessary.
Inflation was not carried out accord‐
ing to specifications, e.g., the tire has
not been sufficiently inflated.
3. Reset the system.
The system has detected a wheel
change, but no reset was done.
If there is a significant loss of tire
inflation pressure
The tire inflation pressure has fallen
below the level of the last reset.
Message
No reset was performed for the sys‐
tem. The system issues a warning
based on the tire inflation pressures
stored during the last reset.
A yellow warning light is illuminated in
the instrument cluster.
In addition, a symbol with the affected tire ap‐
pears in a Check Control message on the Con‐
trol Display.
Measure
1. Check the tire pressure and correct as
needed.
Symbol Possible cause
There is a flat tire or a major loss in
tire inflation pressure.
2. Perform a system reset.
No reset was performed for the sys‐
tem. The system issues a warning
based on the tire inflation pressures
stored during the last reset.
347
Wheels and tires
MOBILITY
Measure
Maximum speed
1. Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu‐
vers.
You may continue driving with a damaged tire at
speeds up to 50 mph/80 km/h.
Continued driving with a flat tire
2. Check whether the vehicle is fitted with nor‐
mal tires or run-flat tires.
Follow the following when continuing to drive
with a damaged tire:
Run-flat tires, refer to page 337, are labeled
with a circular symbol containing the letters
RSC marked on the tire's sidewall.
1. Avoid sudden braking and steering maneu‐
vers.
2. Do not exceed a speed of 50 mph/80 km/h.
Actions in the event of a flat tire
3. Check the tire inflation pressure in all four
tires at the next opportunity.
Normal tires
1. Identify the damaged tire.
For tires with special approval: if the tire infla‐
tion pressure in all four tires is correct, the
Tire Pressure Monitor may not have been re‐
set. In this case, perform the reset.
Check the tire inflation pressure in all four
tires, for instance using the tire pressure gage
of a flat tire kit.
For tires with special approval: if the tire infla‐
tion pressure in all four tires is correct, the
TPM may not have been reset. In this case,
perform the reset.
Possible driving range with a
depressurized tire
The distance for which it may be possible to
drive safely varies depending on how the vehicle
is loaded and used, e.g., speed, road conditions,
external temperature. The driving range may be
less but may also be more if an economical driv‐
ing style is used.
If tire damage cannot be found, contact a
dealer’s 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.
If the vehicle is loaded with an average weight
and used under favorable conditions, the dis‐
tance for which it may be safe to drive may be up
to 50 miles/80 km.
Use of sealant, for instance from the flat tire kit,
may damage the TPM wheel electronics. Have
the electronics replaced at the next opportunity.
Vehicle handling with damaged tires
Run-flat tires
Vehicles driven with a damaged tire will handle
differently, potentially leading to conditions such
as the following:
Safety information
▷ Greater likelihood of swerving off course.
▷ Longer braking distances.
Warning
Your vehicle handles differently with a run-flat
tire with no or low inflation pressure; for in‐
stance, your lane stability when braking is re‐
duced, braking distances are longer and the
self-steering properties will change. There is a
risk of accident. Drive moderately and do not
exceed a speed of 50 mph/80 km/h.
▷ Changed self-steering properties.
Modify your driving style. Avoid abrupt steering
maneuvers or driving over obstacles, for instance
curbs or potholes.
348
Wheels and tires
MOBILITY
Final tire failure
Measure
Vibrations or loud noises while driving can indi‐
cate the final failure of a tire.
▷ A wheel without TPM wheel electronics, such
as an emergency wheel, is mounted: have
the wheels checked, if needed.
Reduce speed and stop; otherwise, pieces of the
tire could come loose and cause an accident.
▷ Malfunction: have the system checked.
Do not continue driving. Contact a dealer’s serv‐
ice center or another qualified service center or
repair shop.
▷ Interference caused by systems or devices
with the same radio frequency: after leaving
the area of the interference, the system auto‐
matically becomes active again.
System limits
Temperature
▷ For tires with special approval: the system
was unable to complete the reset. Perform a
system reset again.
The tire inflation pressure depends on the tire's
temperature.
Declaration according to NHTSA/
FMVSS 138 Tire Pressure
Monitoring System
Driving or exposure to the sun will increase the
tire's temperature, thus increasing the tire infla‐
tion pressure.
Each tire, including the spare (if provided) should
be checked monthly when cold and inflated to
the inflation pressure recommended by the vehi‐
cle manufacturer on the vehicle placard or tire in‐
flation pressure label. (If your vehicle has tires of
a different size than the size indicated on the ve‐
hicle placard or tire inflation pressure label, you
should determine the proper tire inflation pres‐
sure for those tires.) As an added safety feature,
your vehicle has been equipped with a tire pres‐
sure monitoring system (TPMS) that illuminates
a low tire pressure telltale when one or more of
your tires is significantly under-inflated. Accord‐
ingly, when the low tire pressure telltale illumi‐
nates, 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 effi‐
ciency and tire tread life, and may affect the vehi‐
cle'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 illu‐
mination of the TPMS low tire pressure telltale.
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when the
system is not operating properly. The TPMS
The tire inflation pressure is reduced when the
tire temperature falls again.
These circumstances may cause a warning
when temperatures fall very sharply.
Following a temperature-related warning, the tar‐
get pressures are displayed on the Control Dis‐
play again after a short distance.
Sudden tire pressure loss
The system cannot indicate sudden serious tire
damage caused by external circumstances.
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 although
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.
349
Wheels and tires
MOBILITY
malfunction indicator is combined with the low
tire pressure telltale. When the system detects a
malfunction, the telltale will flash for approxi‐
mately one minute and then remain continuously
illuminated. This sequence will continue upon
subsequent vehicle start-ups as long as the mal‐
function exists. When the malfunction indicator is
illuminated, the system may not be able to de‐
tect 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 functioning properly. Al‐
ways check the TPMS malfunction telltale after
replacing one or more tires or wheels on your ve‐
hicle to ensure that the replacement or alternate
tires and wheels allow the TPMS to continue to
function properly.
Status display
The current status of the flat tire monitor can be
displayed, for instance whether the RPA is active.
Via iDrive:
1. "CAR"
2. "Vehicle status"
3.
"Flat Tire Monitor"
The status is displayed.
Initialization required
An initialization must be performed in the follow‐
ing situations:
▷ After the tire inflation pressure has been ad‐
justed.
▷ After a tire or wheel replacement.
Performing initialization
Flat Tire Monitor FTM
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.
Concept
The system detects tire inflation pressure loss
on the basis of rotation speed differences be‐
tween the individual wheels while driving.
Do not initialize the system when driving with
snow chains.
In the event of a tire inflation pressure loss, the
diameter and therefore the rotational speed of
the corresponding wheel changes. The differ‐
ence will be detected and reported as a flat tire.
Via iDrive:
1. "CAR"
2. "Vehicle status"
3. "Flat Tire Monitor"
The system does not measure the actual infla‐
tion pressure in the tires.
4. Switch on drive-ready state and do not drive
off.
Functional requirements
The following conditions must be met for the
system; otherwise, reliable flagging of a loss of
tire inflation pressure is not assured:
5. Start the initialization with: "Perform reset"
6. Drive away.
The initialization is completed while driving,
which can be interrupted at any time.
▷ After a tire or wheel replacement, an initializa‐
tion was performed with the correct tire infla‐
tion pressure.
The initialization automatically continues when
driving resumes.
▷ After the tire pressure was adjusted to a new
value, an initialization was performed.
350
Wheels and tires
MOBILITY
Messages
Actions in the event of a flat tire
General information
Normal tires
When a flat tire is indicated, DSC Dynamic Sta‐
bility Control is switched on, if needed.
1. Identify the damaged tire.
To do this, check the tire inflation pressure in
all four tires, for instance using the tire pres‐
sure gage of a flat tire kit.
Safety information
If the tire inflation pressure in all four tires is
correct, the Flat Tire Monitor may not have
been initialized. In this case, initialize the sys‐
tem.
Warning
A damaged regular tire with low or missing tire
inflation pressure impacts handling, such as
steering and braking response. Run-flat 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 infor‐
mation on run-flat tires and continued driving
with these tires.
If identification of flat tire damage is not pos‐
sible, please contact a dealer’s 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.
Run-flat tires
Indication of a flat tire
Safety information
A yellow warning light is illuminated in
the instrument cluster.
Warning
In addition, a symbol with a Check Control mes‐
sage appears on the Control Display.
Your vehicle handles differently with a run-flat
tire with no or low inflation pressure; for in‐
stance, your lane stability when braking is re‐
duced, braking distances are longer and the
self-steering properties will change. There is a
risk of accident. Drive moderately and do not
exceed a speed of 50 mph/80 km/h.
Symbol Possible cause
There is a flat tire or a major loss in
tire inflation pressure.
Measure
1. Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu‐
vers.
Maximum speed
You may continue driving with a damaged tire at
speeds up to 50 mph/80 km/h.
2. Check whether the vehicle is fitted with nor‐
mal tires or run-flat tires.
Continued driving with a flat tire
Run-flat tires, refer to page 337, are labeled
with a circular symbol containing the letters
RSC marked on the tire's sidewall.
Follow the following when continuing to drive
with a damaged tire:
1. Avoid sudden braking and steering maneu‐
vers.
2. Do not exceed a speed of 50 mph/80 km/h.
351
Wheels and tires
MOBILITY
3. Check the tire inflation pressure in all four
tires at the next opportunity.
▷ A natural, even tire inflation pressure loss in
all four tires will not be recognized. Therefore,
check the tire inflation pressure regularly.
If the tire inflation pressure in all four tires is
correct, the Flat Tire Monitor may not have
been initialized. In this case, initialize the sys‐
tem.
▷ Sudden serious tire damage caused by exter‐
nal circumstances cannot be recognized in
advance.
▷ When the system has not been initialized.
Possible driving range with a
depressurized tire
▷ When driving on a snowy or slippery road sur‐
face.
The distance for which it may be possible to
drive safely varies depending on how the vehicle
is loaded and used, e.g., speed, road conditions,
external temperature. The driving range may be
less but may also be more if an economical driv‐
ing style is used.
▷ Sporty driving style: spinning traction wheels,
high lateral acceleration (drifting).
▷ When driving with snow chains.
Changing wheels/tires
If the vehicle is loaded with an average weight
and used under favorable conditions, the dis‐
tance for which it may be safe to drive may be up
to 50 miles/80 km.
General information
When using run-flat tires or a flat tire kit, a wheel
does not always need to be changed immedi‐
ately when there is a loss of tire inflation pressure
due to a flat tire.
Vehicle handling with damaged tires
Vehicles driven with a damaged tire will handle
differently, potentially leading to conditions such
as the following:
If needed, the tools for changing wheels are
available as accessories from a dealer’s service
center or another qualified service center or re‐
pair shop.
▷ Greater likelihood of swerving off course.
▷ Longer braking distances.
▷ Changed self-steering properties.
Safety information
Modify your driving style. Avoid abrupt steering
maneuvers or driving over obstacles, for instance
curbs or potholes.
DANGER
The vehicle jack is only provided for short-term
lifting of the vehicle for wheel changes. Even if
all safety measures are observed, there is a risk
of the raised vehicle falling, if the vehicle jack
tips over. There is a risk of injuries or danger to
life. If the vehicle is raised, do not lie under the
vehicle and do not start the engine.
Final tire failure
Vibrations or loud noises while driving can indi‐
cate the final failure of a tire.
Reduce speed and stop; otherwise, pieces of the
tire could come loose and cause an accident.
Do not continue driving. Contact a dealer’s serv‐
ice center or another qualified service center or
repair shop.
System limits
The system could be delayed or malfunction in
the following situations:
352
Wheels and tires
MOBILITY
risk of damage to property. When cranking up
the vehicle jack, ensure that it is inserted in the
jacking point next to the wheel housing.
DANGER
Supports such as wooden blocks under the ve‐
hicle jack reduce the capacity of the vehicle
jack to bear weight. They have the potential to
exert too much strain on the vehicle jack, caus‐
ing it to tip over and the vehicle to fall. There is
a risk of injuries or danger to life. Do not place
supports under the vehicle jack.
Warning
A vehicle that is raised on a vehicle jack may fall
off of the jack if lateral forces are exerted on it.
There is a risk of injury and risk of damage to
property. While the vehicle is raised, do not ex‐
ert lateral forces on the vehicle or pull abruptly
on the vehicle. Have a stuck wheel removed by
a dealer’s service center or another qualified
service center or repair 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 de‐
signed for frequent use; for example, changing
from summer to winter tires. Using the jack fre‐
quently 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 attach
an emergency or spare wheel in the event of a
breakdown.
Securing the vehicle against
rolling
General information
The vehicle manufacturer recommends to addi‐
tionally secure the vehicle against rolling away
when changing a wheel.
On a level surface
Warning
On soft, uneven or slippery ground, for example
snow, ice, tiles, etc., the vehicle jack can slip
away. There is a risk of injury. If possible,
change the wheel on a flat, solid, and slip-re‐
sistant surface.
Warning
The vehicle jack is optimized for lifting the vehi‐
cle 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 vehicle jack.
Place wheel chocks or other suitable objects in
front and behind the wheel that is diagonal to the
wheel to be changed.
Warning
If the vehicle jack is not inserted into the jacking
point provided for this purpose, the vehicle may
be damaged or the vehicle jack may slip when
it is being cranked up. There is a risk of injury or
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Wheels and tires
MOBILITY
3. Remove the adapter after unscrewing the lug
bolt.
On a slight downhill gradient
Screwing on
1. Attach the adapter to the lug bolt. If neces‐
sary, turn the adapter until it fits on the lug
bolt.
2. Screw on the lug bolt. The tightening torque
is 140 Nm.
3. Remove the adapter and stow it after screw‐
ing on the lug bolt.
If you need to change a wheel on a slight down‐
hill grade, place chocks and other suitable ob‐
jects, for instance a rock, under the wheels of
both the front and rear axles against the rolling
direction.
Preparing the vehicle
▷ Park the vehicle on solid and non-slip ground
at a safe distance from traffic.
▷ Switch on the hazard warning system.
▷ Set the parking brake.
Lug bolt lock
Concept
The wheel lug bolts have a special coding. The
lug bolts can only be released with the adapter
which matches the coding.
▷ Engage a gear or move the selector lever to
position P.
▷ As soon as permitted by the traffic flow, have
all vehicle occupants get out of the vehicle
and ensure that they remain outside the im‐
mediate area in a safe place, such as behind a
guardrail.
Overview
The adapter of the lug bolt lock is in the onboard
vehicle tool kit or in a storage compartment close
to the onboard vehicle tool kit.
▷ Depending on the vehicle equipment, get
wheel change tools and, if necessary, the
emergency wheel from the vehicle.
▷ If necessary, set up a warning triangle or port‐
able hazard warning light at an appropriate
distance.
▷ Secure the vehicle additionally against rolling.
▷ Loosen the lug bolts a half turn.
▷ Deactivate the air suspension level adjust‐
ment, refer to page 265.
▷ Lug bolt, arrow 1.
▷ Adapter, arrow 2.
Unscrewing
1. Attach the adapter to the lug bolt.
2. Unscrew the lug bolt.
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Wheels and tires
MOBILITY
Jacking points for the vehicle
jack
Jacking up the vehicle
Warning
Hands and fingers can be jammed when using
the vehicle jack. There is a risk of injury. Com‐
ply with the described hand position and do not
change this position while using the vehicle
jack.
1. Hold the vehicle jack with one hand, arrow 1,
and grasp the vehicle jack crank or lever with
your other hand, arrow 2.
The jacking points for the vehicle jack are lo‐
cated at the indicated positions.
2. Insert the vehicle jack into the rectangular re‐
cess of the jacking point closest to the wheel
to be changed.
355
Wheels and tires
MOBILITY
3. Extend the vehicle jack by turning the vehicle
jack crank or lever clockwise.
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 cross‐
wise pattern until hand-tight.
If non-original light-alloy wheels of the vehicle
manufacturer are mounted, the accompany‐
ing lug bolts may have to be used as well.
4. Take your hand away from the vehicle jack as
soon as the vehicle jack is under load and
continue turning the vehicle jack crank or
lever with one hand.
4. Hand-tighten the remaining lug bolts and
tighten all lug bolts well in a crosswise pat‐
tern.
5. Turn the vehicle jack crank counterclockwise
to retract the vehicle jack and lower the vehi‐
cle.
5. Make sure that the vehicle jack foot stands
vertically and at a right angle beneath the
jacking point.
6. Remove the vehicle jack and stow it securely.
After the wheel change
1. Tighten the lug bolts crosswise. The tighten‐
ing torque is 101 lbs ft/140 Nm.
2. Stow the nonworking wheel in the cargo area,
if necessary.
The nonworking wheel cannot be stored un‐
der the cargo floor panel because of its size.
3. Check tire inflation pressure at the next op‐
portunity and correct as needed.
6. Make sure that the vehicle jack foot stands
vertically and perpendicularly beneath the
jacking point after extending the vehicle jack.
4. Reinitialize the Flat Tire Monitor.
Reset the Tire Pressure Monitor TPM.
5. Check to make sure the lug bolts are tight
with a calibrated torque wrench.
6. Have the damaged tire replaced at the near‐
est dealer's service center or another quali‐
fied service center or repair shop.
Emergency wheel
7. Crank the vehicle up, until the vehicle jack is
with the entire surface on the ground and the
relevant wheel is maximum 1.2 inches/3 cm
above ground.
Concept
In the event of a flat tire, the emergency wheel
can be used in place of the wheel with the defec‐
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Wheels and tires
MOBILITY
tive tire. The emergency wheel is only intended
for temporary use until the defective tire/wheel
has been replaced.
Removing the emergency wheel
1. Remove the cargo floor panel. To do this, pull
the cargo floor panel upward directly behind
the rear backrests.
General information
Mount one emergency wheel only.
Also check the tire inflation pressure of the
emergency wheel in the cargo area regularly, and
correct it as needed.
Safety information
Warning
2. Open the ratchet strap.
The emergency wheel has particular dimen‐
sions. When driving with an emergency wheel,
changed driving properties may occur, for in‐
stance reduced lane stability when braking, lon‐
ger braking distance, and changed self-steering
properties in the limit area. There is a risk of ac‐
cident. Drive moderately and do not exceed a
speed of 50 mph/80 km/h.
Overview
3. Remove the tool holder.
4. Remove the emergency wheel from the stor‐
age well. Do not remove any covers.
Inserting the emergency wheel
1. Place the emergency wheel in the storage
well.
2. Insert the tool holder.
3. Tie the ratchet strap. Make sure that it is cor‐
rectly and firmly seated.
The emergency wheel and the wheel change
tools are located in the cargo area under the
cargo floor panel.
4. Insert the cargo floor panel.
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