See also:

Switching the system on/off
Press the left or right side of the button on the CD/DVD player in the rear for the respective page. Rear entertainment and screens are switched on/off. After switching off the ignition, ...

Maintenance
The battery is maintenance-free, i.e., the electrolyte will last for the life of the battery. Your service center will be glad to advise you on questions regarding the battery. ...

Malfunction
A Check Control message is displayed. Adaptive light control is malfunctioning or has failed. Have the system checked as soon as possible. ...