The concept

HDC is a downhill driving assistant that automatically controls vehicle speed on steep downhill gradients. Without the brakes being applied, the vehicle moves at slightly more than twice walking speed.

Hill Descent Control can be activated 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.

As long as there is active braking, the system is on standby. The system does not brake the vehicle during this time.

Use HDC in low gears or in transmission position D or R only.

    See also:

    Switching on/off
    Press the button. ...

    Use coasting conditions
    When approaching a red light, take your foot off the accelerator and let the vehicle coast to a halt. On a downhill gradient, take your foot off the accelerator and let the vehicle roll. The flo ...

    Switching on/off and interrupting cruise control
    Switching on Press the button on the steering wheel. The indicator lamps in the instrument cluster light up and the mark in the speedometer is set to the current speed. Cruise control can ...