See also:

Folding the exterior mirrors in or out automatically
If the "Fold in mirrors when locking" function is activated in the on-board computer: - the exterior mirrors fold in automatically as soon as you lock the vehicle from the outside. - ...

Mercedes-Benz M-Class Owners Manual
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Tires
30 Use of snow chains not permitted. Observe the notes in the "Snow chains" section. 31 MOExtended tires (tires featuring run-flat characteristics) only in combination with an a ...