Deutsch
EnglishDriving stability control systems -> HDC Hill Descent Control for your BMW X4 2014-2018
Driving stability control systems
Controls
Deactivating DTC
HDC Hill Descent Control
Press button again.
TRACTION and the DSC OFF indica‐
tor lamp go out.
Concept
HDC is a downhill driving assistant that auto‐
matically controls vehicle speed on steep
downhill gradients. Without applying the
brakes, the vehicle moves at slightly more than
walking speed. It the brakes are actively ap‐
plied, the system distributes force according to
the traction.
Performance Control
Performance Control enhances the agility of
the vehicle.
Vehicle stability and maneuverability are im‐
proved on downhill gradients.
To increase maneuverability, with a corre‐
spondingly sporty driving style, wheels are
braked individually. The resulting braking
power is simultaneously largely compensated
by an engine intervention.
Hill Descent Control can be activated at
speeds below approx. 22 mph/35 km/h. When
driving downhill, the vehicle reduces its speed
and then keeps its speed constant.
Only use HDC in low gears or in selector lever
position D or R.
xDrive
xDrive is the all-wheel-drive system of your ve‐
hicle. Concerted action by the xDrive and DSC
further optimize traction and driving dynamics.
The xDrive all-wheel-drive system variably dis‐
tributes the drive forces to the front and rear
axles as demanded by the driving situation and
road surface.
Increasing or decreasing vehicle
speed
Specify desired speed in the range from ap‐
prox. 4 mph/6 km/h to approx. 15 mph/25 km/h
using the rocker switch of the cruise control on
the steering wheel. Vehicle speed can be
changed by lightly accelerating.
Display on the Control Display
Displaying xDrive view
1. "Vehicle info"
2. "xDrive status"
The following information is displayed:
▷
With a navigation system: compass display
for the driving direction
▷
▷
Pitch attitude with degree and percentage.
▷
▷
Press the rocker switch up to the point of
resistance: the speed increases gradually.
Transverse gradient with degree indica‐
tion.
Press up the rocker switch past the point
of resistance: the speed increases while
the rocker switch is pressed.
▷
Graphic display for the steering.
▷
Press the rocker switch down to the point
of resistance: the speed decreases gradu‐
ally.
129
Controls
Driving stability control systems
▷
Press the rocker switch down past the
point of resistance: when driving forward,
the speed decreases to approx.
6 mph/10 km/h; when reversing, the speed
decreases to approx. 4 mph/6 km/h.
Dynamic Damping Control
Concept
This system reduces undesirable vehicle mo‐
tion when using a dynamic driving style or trav‐
eling on uneven road surfaces.
Activating HDC
This enhances the driving dynamics and driv‐
ing comfort depending on the road surface
condition and driving style.
Programs
The system offers several different programs.
The programs can be selected via Driving Dy‐
namics Control.
SPORT
Press button; the LED above the button
lights up.
Consistently sporty control of the shock ab‐
sorbers for greater driving agility.
SPORT+
Deactivating HDC
Consistently sporty control of the shock ab‐
sorbers for greater driving agility when driving
with limited driving stabilization.
Press button again. The LED goes out.
HDC is automatically deactivated above
approx. 37 mph/60 km/h.
COMFORT/ECO PRO
Balanced control of the vehicle.
Display in the instrument cluster
The selected speed is displayed
in the speedometer.
Variable sport steering
▷
Green: the system is actively
braking the vehicle.
The variable sport steering increases the
steering angle of the front wheels at large
steering wheel angles, e.g., in tight curves or
when parking. Steering becomes more direct.
▷
Orange: the system is on
standby.
It also varies the force required to turn the
wheels in accordance with the vehicle speed.
Malfunction
A message is displayed in the instrument clus‐
ter. HDC is not available, e.g., due to elevated
brake temperatures.
This results in a sporty steering response. In
addition, it becomes easier to steer during
parking and maneuvering.
130
