See also:

Convenience opening feature
You can ventilate the vehicle before you start driving. To do this, the key is used to carry out the following functions simultaneously: unlock the vehicle open the side windows open the pan ...

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 ...

Servicing the brakes
If the red brake warning lamp lights up in the instrument cluster and you hear a warning tone while the engine is running, the brake fluid level may be too low. Observe additional warning ...