See also:

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. ...

Automatic Hold
The concept This system assists the driver by automatically setting and releasing the brake, such as when moving in stop-and-go traffic. The vehicle is automatically held in place when it is st ...