Anti-theft protection
Immobiliser
The immobiliser prevents your vehicle from
being started without the correct key.
The immobiliser is automatically activated when
the ignition is switched off and deactivated when
the ignition is switched on.
ATA (Anti-Theft Alarm system)
Function of the ATA system (anti-theft alarm
system)
If the ATA system is primed, a visual and audible
alarm is triggered in the following situations:
R
A door is opened.
R
The boot lid is opened.
R
The bonnet is opened.
R
Interior protection is triggered. (→ page 79)
R
Tow-away protection is triggered.
(→ page 79)
The ATA system is primed automatically after
approximately 10 seconds:
R
After locking the vehicle with the key.
R
After locking the vehicle using KEYLESS-GO.
When the ATA system is primed, indicator lamp
1 flashes.
The ATA system is automatically deactivated:
R
After unlocking the vehicle with the key.
R
After pressing the start/stop button with the
key inside the vehicle.
R
After unlocking the vehicle using KEYLESS-
GO.
%
When the Mercedes‑Benz emergency call
system is active and the alarm stays on for
more than 30 seconds, a message is auto‐
matically sent to the Customer Assistance
Centre (→ page 266).
Deactivating the ATA (anti-theft alarm sys‐
tem) alarm
#
Press the %, & or p button on the
key.
or
#
Press the start/stop button (the SmartKey is
inside the vehicle).
Stopping the alarm using KEYLESS-GO
#
Grasp the outside door handle (with the key
outside the vehicle).
78
Opening and closing