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

See also:
Head-Up Display with full-colour capability
The new-generation Head-Up Display delivers even greater display quality,
functionality and flexibility. The symbols projected onto the windscreen are
displayed in sharp resolution in the driver's ...
Maintenance and repair
Advanced technology, e.g. the use of modern
materials and powerful electronics, requires specially adapted maintenance and repair
methods. You should therefore have the corresponding work on your ...
Malfunction
A message is displayed in the instrument cluster.
HDC is not available, e.g., due to elevated
brake temperatures. ...
