BMW X7 Owner's Manual page 232

CONTROLS
HDC Hill Descent Control
Principle
HDC Hill Descent Control is a downhill control
feature that controls the vehicle speed on steep
downhill grades, for instance when driving on un‐
paved roads.
General information
When the system is active, the vehicle moves at
the speed set by the driver, without the driver
having to depress the brake pedal.
While HDC is controlling the speed, the system
automatically distributes the braking force to the
individual wheels. This improves vehicle drivabil‐
ity and driving stability. If necessary, the Antilock
Braking System prevents the wheels from lock‐
ing.
Hill Descent Control can be activated at speeds
below approx. 25 mph/40 km/h.
Speeds can be set between approx.
2 mph/3 km/h and approx. 20 mph/30 km/h.
When the vehicle is driving downhill, the system
reduces the speed to the set value, within the
physical limits.
Overview
Button in the vehicle
HDC
232
Driving stability control systems
Online Edition for Part no. 01405A385B6 - VI/21
Activating HDC
Press the button.
The LED on the button lights up.
Speeds between approx. 2 mph/3 km/h and ap‐
prox. 20 mph/30 km/h are adopted as the set
speed.
Emergency braking function, Active PDC: the
emergency braking function is deactivated.
Additional information:
Emergency brake function, Active PDC, refer to
page 262.
Display in the instrument cluster
An icon and the selected desired
speed are displayed.
▷ Indicator green: HDC is active.
The system is actively braking
the vehicle.
▷ Gray display: HDC is on standby.
Display in the Head-up Display
The HDC status can also be displayed in the
Head-up Display.
Increasing or decreasing vehicle
speed
Using the cruise control rocker
switch
The set speed can be changed using the cruise
control rocker switch on the steering wheel.