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:

    Message when the system was not reset
    A Check Control message is displayed. The system detected a wheel change but was not reset. Warnings regarding the current tire inflation pressure are not reliable. Check the tire inflation pre ...

    Using voice activation
    Activating the voice activation system 1. Press the button on the steering wheel. 2. Wait for the signal. 3. Say the command. The command is displayed in the instrument cluster. This symb ...

    Possible commands
    Having possible commands read aloud   Briefly press the button on the steering wheel. ›Help‹. Possible commands are announced. The digits from zero to nine are recognized. The digits can ...