The windshield wipers are inoperative

The windshield wiper drive is malfunctioning.

the Select another wiper speed on the combination switch.
at a Have the windshield wipers checked at a qualified specialist workshop.

    See also:

    Tires
    WARNING   Do not drive with a flat tire. A flat tire affects the ability to steer or brake the vehicle. You may lose control of the vehicle. Continued driving with a flat tire will cause ...

    The windshield wipers are obstructed
    Leaves or snow, for example, may be obstructing the windshield wiper movement. The wiper motor has been deactivated. - For safety reasons, you should remove the SmartKey from the ignition lock. ...

    GL-Class in the Market
    The GL's price spread gives it a wide range of competitors. At the low end it competes with Infiniti and Lincoln, and at the high end there's Lexus and Land Rover. Though sales are down these days ...