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:
Applying automatically
Your vehicle's electric parking brake is
automatically applied if DISTRONIC PLUS or
the HOLD function bring the vehicle to a
standstill, or are engaged to keep the vehicle
stationary. In addit ...
"Coupling up a trailer" function
This function is only available on vehicles with
a trailer tow hitch.
1 Center of the vehicle on the red guide line
approximately 10 in (0.25 m) away from
the rear area
2 Center of the vehic ...
Engine emergency off
If the engine cannot be switched off as
described, observe the following procedure:
► Take the fuse allocation chart out of the
vehicle tool kit.
► Search for fuse 120 in the fuse al ...
