See also:

Opening and closing the service flap
You must open the service flap in the cargo compartment before you can change the bulbs in the tail lamps. Left-hand service flap Right-hand service flap - To open: release service flap 1 a ...

Please bear the following in mind
At the onset of winter, have your vehicle winterproofed at a qualified specialist workshop, e.g. at an authorized Mercedes- Benz Center. Observe the notes in the "Changing a wheel" ...

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