The concept

HDC is a downhill driving assistant that automatically controls vehicle speed on steep downhill gradients. The vehicle moves at approximately walking speed without braking intervention by the driver.

You can activate the Hill Descent Control at speeds below approx. 22 mph/35 km/h. When moving downhill at speeds below approx.

22 mph/35 km/h, the vehicle reduces its speed to approximately walking speed, approx. 5 mph/ 8 km/h and keeps it constant.

Only use HDC in transmission positions D or R.

    See also:

    Opening/closing the glass sunroof
    When the sliding visor is open, proceed as described under Sliding visor. ...

    Preparation
    1. Check whether the battery of the other vehicle has a voltage of 12 volts. This information can be found on the battery. 2. Switch off the engine of the assisting vehicle. 3. Switch off any el ...

    Malfunction
    In the event of a failure or malfunction of the parking brake, secure the vehicle against rolling using a wheel chock, for example, when leaving it. ...