The concept

The system is functional at speeds beginning at approx. 20 mph/30 km/h.

It maintains the speed that was set using the control elements on the steering wheel.

The system brakes on downhill gradients if engine braking action is insufficient.

Do not use the system if unfavorable conditions Unfavorable conditions
Do not use the system if unfavorable conditions make it impossible to drive at a constant speed, for instance:
► On curvy roads.
► In heavy traffic.
► On slippery roads, in fog, snow or rain, or on a loose road surface.
Otherwise, you could lose control of the vehicle and cause an accident.◄

    See also:

    Notes
    At high temperatures, the charge function of the mobile phone can be limited where appropriate and the functions are no longer executed. When the mobile phone is used via the vehicle, ...

    Switching on/off
    Press the button ...

    Activating HDC
    Press the button; the LED above the button lights up. ...