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:

    Additives
    Only use DEF in accordance with ISO 22241. Do not use additives with DEF and do not dilute DEF with water. This may destroy the BlueTEC exhaust gas aftertreatment system. ...

    Displaying the coolant temperature
    WARNING   Driving when your engine is overheated can cause some fluids which may have leaked into the engine compartment to catch fire. You could be seriously burned. Steam from an over ...

    Diesel Power
    The GL350 Bluetec's 3.0-liter diesel V-6 makes 210 horsepower. There's some familiar diesel clatter when accelerating, though the noise is nothing like an 18-wheeler. The sound is more akin to tha ...