Switching off
The system can be deactivated as follows:
▷ 
Press the button.
▷ Switch off the ignition.
See also:
Display
▷ Lines, arrow 1: the system is activated.
▷ Arrows, arrow 2: at least one lane marking
was detected and warnings can be issued. ...
Malfunction
A Check Control message is displayed.
On the Control Display, the areas in front of and
behind the vehicle are shaded. PDC has failed.
Have the system checked.
To ensure full operability:
` ...
Resetting the tone settings
1. "CD/Multimedia", "Radio" or "Settings"
2. "Tone"
3. "Reset" ...