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:

    Mercedes-Benz M-Class Owners Manual
    ...

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