Switching the automatic locking feature on/off
Requirements:
The power supply or the ignition is switched on.
The doors are closed.
When the ignition is switched on and the vehicle is driving at a speed above 15 km/h, the vehicle locks automatically.
Central locking buttons (vehicles with manually adjustable front seats)
Central locking buttons (vehicles with electrically adjustable front seats)
There is a danger of being locked out when the function is activated in the following situations:
when tow starting the vehicle
when pushing the vehicle
if the vehicle is being tested on a roller dynamometer
To switch on:
press and hold button 
for approximately five seconds. An acoustic signal sounds.
To switch off:
press and hold button 
for approximately five seconds. An acoustic signal sounds.