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:

    Warning and indicator lamps
    1 Low-beam headlamps 2 ESP® 3 High-beam headlamps 4 Electric parking brake (red) (USA only) (Canada only) 5 Electric parking brake (yellow) 6 Distance warning signal 7 Turn signal 8 Tire ...

    Cleaning the display
    – Before cleaning the display, make sure that it is switched off and has cooled down. – Clean the display surface using a commercially-available microfiber cloth and TFT/LCD display cleaner. – ...

    Effortlessly superior: new four-cylinder diesel engine and proven V6 powerplants
    State-of-the-art powerplants ensure an exceptionally high level of ride comfort and impressive performance right across the GLK range. Plus fuel-consumption figures are low, as is the emission cou ...