This chapter contains information on the following subjects:
→ Description of the central locking system  
→ Locking and unlocking the vehicle from the outside  → Locking and unlocking the vehicle from the inside  
→ Locking and unlocking the vehicle with  → SAFELOCK mechanism  
→ Anti-theft alarm  → Interior monitoring system and anti-tow alarm  
The central locking system will only work correctly when all doors and the tailgate are properly closed. The vehicle cannot be locked with the key if the driver door is open.
In vehicles with the Keyless Access locking and starting system, the vehicle can only be locked when the ignition has been switched off and the driver door is closed.
If the vehicle is unlocked and not used for a long time (e.g. in your own garage) the vehicle battery could discharge or the engine may not start.
Additional information and warnings:

WARNING
Description of the central locking systemRemoving and installing bonnet lock
Special tools and workshop equipment
required
Removing
Torque wrench -V.A.G 1331-
Note
If the rear lid does not open, it can be opened in a ...
Removing and installing oil spray jets
Special tools and workshop equipment
required
Socket -T10545-
Removing
–
Remove noise insulation
→ General body repairs, exterior; Rep. gr.66.
...
Removing and installing mounting bracket, LHD vehicles
Remove dash panel end cover on driver side
→ General body repairs, interior; Rep. gr.70.
–
Remove footwell cover on driver side
→ General body repairs, interior; Rep. gr.68.
â ...