See also:

Backrest width
Change the width of the backrest using the side wings to adjust the lateral support. ...

Long-term vehicle storage
Your service center can advise you on what to consider when storing the vehicle for longer than three months. ...

What to do if...
Only a black screen is visible. Switch on the system. There are no options available on the screen. Switch over between the display screens. Radio stations or TV channels are grayed out ...