Mercedes-Benz GL-Class: Rear window defroster - Operating the climate control system - Climate control - Mercedes-Benz GL-Class Owner's ManualMercedes-Benz GL-Class: Rear window defroster

Activating/deactivating

WARNING Any accumulation of snow and ice should be 
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 has a high current draw. You should therefore switch it off as soon as the window is clear as it only switches off automatically after several minutes.

If the battery voltage is too low, the rear window defroster may switch off.

► Turn the SmartKey to position 2 in the ignition lock.
► Press the button.

The indicator lamp in the lights button lights up or goes out.

Problems with the rear window defroster

If the indicator lamp in the rear window rear window defroster button flashes, the on-board voltage is too low or the roof is open. 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 is sufficiently charged, the rear window defroster is activated again automatically.

    Defrosting the windows
    Windows fogged up on the inside ► Activate the cooling with air dehumidification function . ► Activate automatic mode . ► If the windows continue to fog up, activate the defr ...

    Activating/deactivating airrecirculation mode
    You can deactivate the flow of fresh air if unpleasant odors are entering the vehicle from outside. The air already inside the vehicle will then be recirculated. The operation of air-recirculati ...

    See also:

    Brake fluid
    WARNING   The brake fluid constantly absorbs moisture from the air; this lowers its boiling point. If the boiling point of the brake fluid is too low, vapor pockets may form in the brake ...

    Winter driving
    Important safety notes WARNING   If the vehicle becomes trapped in snow, ensure that snow is kept away from the exhaust pipe and from around the vehicle as long as the engine is running ...

    Roadside Assistance
    The Mercedes-Benz Roadside Assistance Program offers technical help in the event of a breakdown. Calls to the toll-free Roadside Assistance Hotline are answered by our agents 24 hours a day, 365 d ...