Cleaning the seat belts

solution.  Use clean, lukewarm water and soap solution.

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.

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:

    Problems with PARKTRONIC
    ...

    Belt height adjustment
    You can adjust the seat belt height on the driver's seat and the front-passenger seat. Adjust the height so that the upper part of the seat belt is routed across the center of your shoulder. ...

    Please bear the following in mind
    For safety reasons, Mercedes-Benz recommends that you only use Tires and wheels which have been approved by Mercedes-Benz specifically for your vehicle. These tires have been specially adapted f ...