Mercedes-Benz CLA Operator's Manual page 87

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In the event the engine cannot be started (yet
the vehicle's 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).
A A T T A A (anti-t (anti-the he alar alarm syst m system) em)
F F unction of t unction of the AT he ATA syst A system em
If the ATA system is armed, a visual and audible
alarm is triggered in the following situations:
When a door is opened
R
When the trunk lid is opened
R
When the hood is opened
R
When the interior motion sensor is triggered
R
( page 86)
/
When the tow-away alarm is triggered
R
( page 86)
/
The ATA system is armed automatically a er
approximately ten seconds in the following situa-
tions:
A er locking the vehicle with the SmartKey
R
A er locking the vehicle using KEYLESS-GO
R
Indicator lamp 1 ashes when the ATA system is
armed.
The ATA system is deactivated automatically in the
following situations:
A er unlocking the vehicle with the SmartKey
R
A er unlocking the vehicle using KEYLESS-GO
R
Opening and closing
A er pressing the start/stop button with the
R
SmartKey in the marked space (
/
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When the Mercedes‑Benz emergency call sys-
tem is active and the alarm stays on for more
than 30 seconds, a message is automatically
sent to the Customer Assistance Center
( page 249).
/
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In the case of severe battery discharging, the
anti-the alarm system is automatically deac-
tivated to facilitate the next engine start.
Deactiv Deactivating t ating the ATA he ATA
Press the Ü, ß or p button on the
#
SmartKey.
or
Press the start/stop button with the SmartKey
#
in the stowage compartment (
/
Deactiv Deactivating t ating the alar he alarm using KEYLESS-GO m using KEYLESS-GO
Grasp the outside door handle with the Smart-
#
Key outside the vehicle.
85 85
page 131)
page 131)