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:

    Controls
    Almost all functions can be operated in the same manner as they are in the front. Special features of operating the system in the rear are described here. ...

    Parking lamps/low beams, headlamp control
    General information If the driver door is opened with the ignition switched off, the exterior lighting is automatically switched off at the following switch settings: 0, , Parking lamps Swit ...

    Arming and disarming the alarm system
    General information When you lock or unlock the vehicle, either with the remote control, Comfort Access or at the door lock the alarm system is armed or disarmed at the same time. Door lock an ...