Malfunction

comes on when the The warning lamp comes on when the system has failed.

A message appears on the Control Display. More information

    See also:

    Engine data
    ...

    Adjusting the side extensions
    Fold the side extensions on the head restraint forward for increased lateral support in the resting position. ...

    Deactivating HDC
    Press the button again and the LED goes out. HDC is automatically deactivated above approx. 37 mph/60 km/h. ...