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:

    Enabling operation in the rear
    Only possible via the iDrive in the front. 1. "Settings" 2. "Allow rear control" 3. Select the desired priority. ...

    Automatic deactivation during forward travel
    The system switches off when a certain driving distance or speed is exceeded. Switch the system back on if necessary. ...

    Notes
    Steam jets or high-pressure washers>? When using steam jets or high-pressure washers, hold them a sufficient distance away and use a maximum temperature of 140 ℉/ 60 ℃. Holdin ...