See also:

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 have ...

Please bear the following in mind
Resetting service interval display If the qualified specialist workshop, e.g. a Mercedes-Benz Center, carried out the maintenance work, the service interval display will be reset. Further info ...

Setting the center air vents
Center air vent, left Center air vent, right Center vent thumbwheel, right Center vent thumbwheel, left To open/close: turn thumbwheels 3 and 4 up or down. ...