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In the event the engine cannot be started
(yet the vehicle’s starter battery is charged),
the system is not operational. Contact an
authorized Mercedes-Benz Center or call
1-800-FOR-MERCedes (in the USA) or
1-800-387-0100 (in Canada).
ATA (anti-theft alarm system)
Function of the ATA system
If the ATA system is armed, a visual and audible
alarm is triggered in the following situations:
R
when a door is opened
R
when the trunk lid is opened
R
when the hood is opened
The ATA system is armed automatically after
approximately ten seconds in the following situa‐
tions:
R
after locking the vehicle with the SmartKey
R
after locking the vehicle using KEYLESS-GO
Indicator lamp 1 flashes when the ATA system
is armed.
The ATA system is deactivated automatically in
the following situations:
R
after unlocking the vehicle with the SmartKey
R
after pressing the start/stop button with the
SmartKey in the stowage compartment
(→ page 136)
R
after unlocking the vehicle using KEYLESS-
GO
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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
Center (→ page 314).
Deactivating the ATA
#
Press the %, & or p button on the
SmartKey.
or
#
Press the start/stop button with the Smart‐
Key in the stowage compartment
(→ page 136)
Deactivating the alarm using KEYLESS-GO:
#
Grasp the outside door handle with the
SmartKey outside the vehicle.
88
Opening and closing
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