See also:

Mobile communication devices in the vehicle
Mobile communication devices in the vehicle It is advised that you do not use mobile communication devices, e.g., mobile phones, inside the vehicle without connecting them directly to the ex ...

The concept
The parking brake is primarily intended to prevent the vehicle from rolling while parked; it brakes the rear wheels. ...

Malfunction
A message is displayed in the instrument cluster. HDC is not available, e.g., due to elevated brake temperatures. ...