See also:

Malfunction
Comfort Access may not function properly if it experiences interference from external sources such as mobile phones, metal objects, overhead power lines, transmission towers, etc. In this case, ...

Radio ready state and ignition off
All indicator and warning lamps as well as displays in the instrument cluster go out. Transmission position P with the ignition off When the ignition is switched off, position P is engaged a ...

Deleting the button assignments
1. Press buttons 1 and 8 simultaneously for approx. five seconds. 2. "OK" ...