Cleaning the seat belts

– Use clean, lukewarm water and soap solution.

Do not clean the seat belts using chemical Do not clean the seat belts using chemical cleaning agents. Do not dry the seat belts by warming them above 176 °F (80 °C) or placing them in direct sunlight.

Do not bleach or dye seat belts as this may WARNING
Do not bleach or dye seat belts as this may severely weaken them. In a crash, they may not be able to provide adequate protection.

    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. ...

    Mercedes-Benz M-Class Owners Manual
    ...

    Engaging the electric parking brake automatically
    The electric parking brake is automatically applied if HOLD or DISTRONIC PLUS brakes the vehicle until it is stationary and at least one of the following conditions is fulfilled: • the engine ...