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:
Problems with KEYLESS-GO, troubleshooting
Locking/unlocking the driver's door with the emergency key