Activating/deactivating the automatic locking feature
The vehicle is locked automatically when the ignition is switched on and the wheels are turning faster than walking pace.
To activate:
press and hold button 
for approximately five seconds until an acoustic signal sounds. To deactivate:
press and hold button 
for approximately five seconds until an acoustic signal sounds. In the following situations, there is a danger of being locked out when the function is activated:
While the vehicle is being tow started/pushed.
If the vehicle is being tested on a roller dynamometer.