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Safety and Security
Anti-theft systems
Immobilizer
The immobilizer prevents unauthorized
persons from starting your vehicle.
Activating
With the SmartKey
̈ Remove the SmartKey from the starter
switch.
With KEYLESS-GO*
̈ Press the KEYLESS-GO start/stop
button (
୴ page 41) on the starter
switch once.
The engine is turned off.
̈ Open the driver’s door.
Deactivating
With the SmartKey
̈ Turn the SmartKey in the starter switch
to position 2 (
୴ page 39).
With KEYLESS-GO*
̈ Switch on the ignition (୴ page 40).
Anti-theft alarm system
Once the alarm system has been armed, a
visual and audible alarm is triggered when
someone opens
ț a door
ț the tailgate
ț the hood
The alarm will stay on, even if the activat-
ing element (a door, for example) is imme-
diately closed.
The alarm system will also be triggered
when
ț the vehicle is opened with the mechan-
ical key, see “Unlocking the vehicle”
(
୴ page 455)
ț a door is opened from the inside, see
“Opening the doors from the inside”
(
୴ page 118)
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Starting the engine will also deactivate the
immobilizer.
In case the engine cannot be started (yet the
vehicle’s battery is charged), the system is not
operational. Contact an authorized
Mercedes-Benz Light Truck Center or call
1-800-FOR-MERCedes (in the USA), or
1-800-387-0100 (in Canada).
i
If the alarm stays on for more than
30 seconds, a call to the Response Center is
initiated automatically by the Tele Aid system
(
୴ page 294) provided that the Tele Aid service
was subscribed to and properly activated, and
that necessary cellular service and GPS cover-
age are available.