See also:

Windows fogged up on the inside
Activate the cooling with air dehumidification function . Activate automatic mode . If the windows continue to fog up, activate the defrosting function. You should only select this setti ...

Problems with your vehicle
If you should experience a problem with your vehicle, particularly one that you believe may affect its safe operation, we urge you to contact an authorized Mercedes-Benz Center immediately to h ...

Additives
Do not use any additives in the engine oil. This could damage the engine. ...