This chapter contains information on the following subjects:
→ Indicator lamp
→ Description of the central locking system→ Locking and unlocking the vehicle from the outside
→ Locking and unlocking the vehicle from the inside→ 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.
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
Indicator lampTest Requirements
Note
Check cooling performance. The A/C system is functioning
correctly when the air flowing from the instrument panel vents
has a temperature of 70C or lower.
Setting on Climatronic “LO”.
...
Checking with Expansion Valve and Receiver/Dryer, with Internally Regulated
A/C Compressor
Note
Connecting service station. Refer to
→ Chapter „Connecting Service Station“.
Observe test requirements. Refer to
→ Chapter „Pressures, Checking“.
–
...
Heel and Toe Wear
Heel-and-toe wear is step-like wear of individual tread
blocks, due to which an increased rolling noise can develop. The
heel-and-toe wear is caused by the uneven distortion of the
tread blocks in the contact patch. Heel-and-toe wear appears in
more extr ...