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 steering wheel and gear or selector lever
    Thoroughly wipe with a damp cloth or use leather care agents that have been recommended and approved by Mercedes-Benz. ...

    Vehicles with automatic transmission
    Apply the parking brake firmly. Shift the transmission to position P. Using the SmartKey Turn the SmartKey to position 0 in the ignition lock and remove it. The immobilizer is activated. ...

    General information
    If COMAND is equipped with a navigation system and has GPS reception, COMAND automatically sets the time and date. You can also adjust the time yourself in 30-minute increments, but the date c ...