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:

    Mercedes-Benz M-Class Owners Manual
    ...

    Clearing the shift range restriction
    - Pull and hold the right-hand steering wheel paddle shifter until D is shown again in the multifunction display. The automatic transmission shifts from the current shift range directly to D. ...

    Redialing
    The on-board computer saves the last names or numbers dialed in the redial memory (Calls Dialed list). Press the or button on the steering wheel to select the Telephone menu. Press the ...