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" section

    See also:

    The windshield wipers are obstructed
    Leaves or snow, for example, may be obstructing the windshield wiper movement. The wiper motor has been deactivated. - For safety reasons, you should remove the SmartKey from the ignition lock. ...

    Side impact air bags
    WARNING The pressure sensors for side impact air bag control are located in the doors. Do not modify any components of the doors or door trim panels including, for example, the addition o ...

    High-beam flasher
    •► To switch on: turn the SmartKey in the ignition lock to position 1 or 2 or start the engine. •► Pull the combination switch in the direction of arrow 3. ...