The concept
HDC is a downhill driving assistant that automatically controls vehicle speed on steep downhill gradients. Without requiring brake application, the vehicle moves at slightly more than twice walking speed.
You can activate the Hill Descent Control at speeds below approx. 22 mph/35 km/h. When driving downhill, the vehicle reduces its speed to approx. twice walking speed and then keeps its speed constant.
While you are actively braking, the system is on standby. The system does not brake the vehicle during this time.
See also:
Switching the wipers on/off and briefwipe
Do not switch on the wipers if frozen
Do not switch on the wipers if they are frozen
onto the windshield; otherwise, the wiper
blades and the windshield wiper motor may be
damaged.◄
Switch ...
Maximum cooling
Press the button.
The system is set to the lowest
temperature, maximum air volume
and recirculated-air mode.
Air flows out of the vents for the upper body region.
Open them for this purpose.
...
Switching on automatically
Select transmission position R with the engine
running.
The images from Top View and PDC are displayed
when the system has been switched on
using iDrive. ...