See also:

Setting the side air vents
To open/close: turn thumbwheel 3 up or down. Side window defroster vent 1 is never completely shut, even if side air vent 2 is shut ...

Windshield/headlamp cleaning system
WARNING Washer solvent/antifreeze is highly flammable. Do not spill washer solvent/ antifreeze on hot engine parts, because it may ignite and burn. You could be seriously burned. Use MB ...

Rejecting or ending a call
– Press the button on the steering wheel. If you are not in the Tel menu, you can still reject or end a call. ...