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 lampBattery with Visual Indicator, Enhanced
This is a maintenance-free battery with liquid electrolyte
(wet battery).
Caution
Do not remove any of the labels on the battery and
do not add distilled water. Only perform a visual
...
Battery Charger -VAS5903- Maintenance Charging
Note
If the battery is discharged by an electrical consumer
during maintenance charging, the Battery Charger -VAS5903-
automatically supplies the appropriate charge.
Maintenance charging can be performed without time ...
Battery Charger -VAS5900- Device Description
WARNING
Risk of injury. Follow all Warnings and Safety
Precautions. Refer to
→ Chapter „Warnings and Safety Precautions“.
WARNING ...