See also:

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 battery ...

Activating/deactivating
WARNING Any accumulation of snow and ice should be removed from the rear window before driving. Visibility could otherwise be impaired, endangering you and others. The rear window defroster ha ...

Windows fogged up on the outside
- Activate the windshield wipers. - Press the button repeatedly until the or symbol appears in the display. You should only select this setting until the windshield is clear again. ...