Switching the automatic locking feature on/off
The vehicle is locked automatically when the ignition is switched on and the wheels are turning faster than walking pace.
To deactivate:
Press and hold button 
for approximately five seconds until an acoustic signal sounds. To activate:
Press and hold button 
for approximately five seconds until an acoustic signal sounds. Danger of being locked out when the function is activated:
If the vehicle is being tow started/pushed.
On a roller dynamometer.