See also:

Checking the oil level using the oildipstick
When checking the oil level: • park the vehicle on a level surface. • the engine should be switched off for approximately five minutes if the engine is at normal operating temperature. Example: ...

Charging the battery
WARNING Never charge a battery still installed in the vehicle unless a battery charger unit approved by Mercedes-Benz is being used. Gases may escape during charging and cause explosions ...

Activating/deactivating airrecirculation mode
You can deactivate the flow of fresh air if unpleasant odors are entering the vehicle from outside. The air already inside the vehicle will then be recirculated. The operation of air-recirculati ...