Problems with the rear window defroster

The rear window defroster has deactivated itself prematurely or cannot be activated.

are not Switch off any consumers that are not required, e.g. reading lamps or interior lighting.
When the battery is sufficiently charged, the rear window defroster is activated again automatically.

    See also:

    Front fog lamps
    WARNING If you suspect that driving conditions will be foggy, turn the light switch to before you start your journey. Otherwise, your vehicle may not be visible and you could endanger yo ...

    Setting the rear-compartment air vents
    Setting the center vents in the rear compartment Setting the center vents in the rear compartment 1 Rear-compartment air vent thumbwheel 2 Rear-compartment air vent, right 3 Rear control panel f ...

    Transfer case
    The vehicle has permanent 4-wheel drive (4MATIC). Power is always transmitted to both axles. Performance tests may only be carried out on a 2-axle dynamometer. The brake system or transfer ca ...