Automatic locking feature
The vehicle locks automatically when the ignition is switched on and the wheels of the vehicle are turning at a speed of more than 9 mph (15 km/h).
You could therefore be locked out when:
- the vehicle is being pushed.
- the vehicle is being towed.
- the vehicle is being tested on a dynamometer.

•► To deactivate: press and hold button 1 for about five seconds until a tone sounds.
•► To activate: press and hold button 2 for about five seconds until a tone sounds.
i If you press one of the two buttons and do not hear a tone, the relevant setting has already been selected.
You can also switch the automatic locking function on and off using the on-board computer
See also:
Important safety notes
WARNING
Only use roof racks approved by Mercedes- Benz for your vehicle model to avoid
damage to the vehicle.
Follow the manufacturer's installation instructions. Otherwise, an improperly ...
Clearing the memory of the integrated
garage door opener on the rear-view
mirror
– Turn the SmartKey to position 2 in the
ignition lock.
– Press transmitter buttons 2 and 4.
The indicator lamp lights up yellow.
– Press and hold transmitter buttons 2
and 4 until the indicato ...
Important safety notes
If a tire pressure monitor system is installed, the vehicle's wheels have sensors
that monitor the tire pressures in all four tires. The tire pressure monitor warns
you when the pressure drops ...
