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:

    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. – ...

    Switching the rear window wiper on/off
    Combination switch 1 Rear window wiper switch 2 To wipe with washer fluid 3 To switch on intermittent wiping 4 To switch off intermittent wiping 5 To wipe with washer fluid – Turn the ...

    High outside temperatures
    If DEF heats up to over 122 °F (50 °C) for extended periods, e.g. as a result of direct sunlight on the DEF reservoir, DEF can decompose. Ammonia vapors develop as a result. WARNING When o ...