Unlocking the driver's door (mechanical key)
If the vehicle can no longer be unlocked with the SmartKey, use the mechanical key.
If you use the mechanical key to unlock and open the driver's door, the anti-theft alarm system will be triggered.
Take the mechanical key out of
the SmartKey.
Insert the mechanical key into the
lock of the driver's door as far as it will go.

Turn the mechanical key
counterclockwise to position 1.
The door is unlocked.
Turn the mechanical key back and
remove it.
Insert the mechanical key into the
SmartKey.
See also:
Adjusting the four-way lumbar support
Vehicles with memory function:
You can adjust the contour of the front seat backrests individually to provide
optimum support for your back.
To raise the backrest contour
To soften the back ...
Parking brake
WARNING
Engaging the parking brake while the vehicle is in motion can cause the rear
wheels to lock up. You could lose control of the vehicle and cause an accident.
In addition, the vehicle& ...
Interior
The M-Class seats five people on front buckets and a three-place split rear
seat that folds to expand cargo space to 81.2 cubic feet. An optional two-place
third-row seat increases passenger capac ...
