See also:

Problems with the sliding sunroof
Problem: the sunroof cannot be closed and you cannot see the cause. WARNING   You could be severely or even fatally injured when closing the sliding sunroof with increased closing force ...

Removing the towing eye
Loosen the towing eye and unscrew it. Attach cover 1 to the bumper and press until it engages. Place the towing eye in the vehicle tool kit. ...

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" ...