Have your vehicle winterproofed at a qualified specialist workshop at the onset of winter.
Observe the notes in the "Changing a wheel" section .
Qualified specialist workshop
An authorized Mercedes-Benz Center is a
qualified specialist workshop. It has the
necessary specialist knowledge, tools and
qualifications to correctly carry out the work
required on your vehicle. ...
Multifunction steering wheel
...
Calling up a stored setting
X Press the button for storage position 1, 2
or 3. Keep pressing until the seat, steering
wheel and exterior mirrors are in the stored
position.
The setting procedure is interrupted as
soon ...