See also:

Cleaning the display
– Before cleaning the display, make sure that it is switched off and has cooled down. – Clean the display surface using a commercially-available microfiber cloth and TFT/LCD display cleaner. – ...

Cleaning the headliner and carpets
Roof lining: use soft brushes or dry shampoo if it is particularly dirty. Carpets: use carpet and textile cleaners that have been approved and recommended by Mercedes-Benz. ...

Problems with the rear window defroster
The rear window defroster has deactivated itself prematurely or cannot be activated. Switch off any consumers that are not required, e.g. reading lamps or interior lighting. When the batter ...