ATA (Anti-Theft Alarm system)
A visual and audible alarm is triggered if the alarm system is armed and you open:
- a door
- the vehicle with the mechanical key
- the trunk lid/tailgate
- the hood
The alarm is not switched off, even if you close the open door that has triggered it, for example.
If the alarm stays on for more than 30 seconds, the emergency call system mbrace (USA only) or TELE AID (Canada only) initiates a call to the Customer Assistance Center automatically. The emergency call system initiates the call provided that:
- you have subscribed to the mbrace/
TELE AID service.
- the mbrace/TELE AID service has been
activated properly.
- the required mobile phone, power supply
and GPS are available.

•► To arm: lock the vehicle with the SmartKey or KEYLESS-GO.
Indicator lamp 1 flashes. The alarm system is armed after approximately 15 seconds.
•► To deactivate: unlock the vehicle with the SmartKey or KEYLESS-GO.
•► To stop the alarm using the SmartKey: insert the SmartKey into the ignition lock.
The alarm is switched off.
or
•► Press the
or
button on the
SmartKey.
The alarm is switched off.
•► To stop the alarm using KEYLESS-GO: grasp the outside door handle. The SmartKey must be outside the vehicle.
The alarm is switched off.
or
•► Press the Start/Stop button on the
dashboard. The SmartKey must be inside
the vehicle.
The alarm is switched off.
See also:
Cleaning the headliner and carpets
Roof lining: use soft brushes or dry shampoo if it is particularly dirty.
Carpets: use carpet and textile cleaners that have been approved and recommended
by Mercedes-Benz.
...
Refrigerant of the air-conditioning
system
The air-conditioning system is filled with
R134a refrigerant and a special PAG
lubricant.
Never use refrigerant R 12 (CFC) or
mineral lubricants. Otherwise, you could
damage the air-conditio ...
