See also:

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 trigg ...

Road-simulation test rig: an ordeal for the chassis
The road-simulation test rigs are just as punishing as the body testing facility. Applying identical load spectra over the same distance, the test engineers torture the M-Class chassis in all of i ...

Switching on Night View Assist Plus
You can only activate Night View Assist Plus if: • the SmartKey is in position 2 in the ignition lock. • it is dark. • the light switch is in the or position. • reverse gear has not b ...