The additional door lock is only available for vehicles for the United Kingdom.
If the additional door lock is activated, the doors can no longer be opened from the inside.
If there are persons in the vehicle, they can no longer leave the vehicle, e.g. in hazardous situations.
after the vehicle has been locked with the key
You can deactivate the additional door lock by deactivating the interior motion sensor More.
The additional door lock is inoperative on vehicles without an interior motion sensor.