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Anti-theft systems
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The electro-hydraulic brake system switches
off automatically
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approximately 2 minutes after you turned
the SmartKey in the starter switch to posi-
tion 0 or removed the SmartKey
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approximately 2 minutes after you pressed
the KEYLESS-GO start/stop button to turn
off the engine or power supply and opened
the driver’s door (with driver’s door open,
the starter switch is set to position 0, same
as SmartKey removed from starter switch)
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approximately 20 seconds after you locked
the vehicle from outside
For more information on your vehicle’s
brakes, see the “Driving instructions” section
(Y page 237).
Anti-theft systems
Immobilizer
The immobilizer prevents unauthorized per-
sons from starting your vehicle.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. The
engine can be started by anyone with a valid
SmartKey that is left inside the vehicle.
Activating
X
With the SmartKey: Remove the Smart-
Key from the starter switch.
X
With KEYLESS-GO: Turn off the engine and
open the driver’s door.
Deactivating
X
Switch on the ignition.
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Starting the engine will also deactivate
the immobilizer.
In the event that 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).
Anti-theft alarm system
Once the alarm system has been armed, a
visual and audible alarm is triggered when
someone opens:
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a door
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the trunk
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the hood
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a storage compartment in the rear
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the glove box
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the storage compartment under the arm-
rest
The alarm will stay on even if the activating
element (a door, for example) is immediately
closed.
The alarm system will also be triggered when
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the vehicle is raised
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the vehicle is opened with the mechanical
key
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a door is opened from the inside
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the trunk is opened with the emergency
release button
To cancel the alarm after it has been trig-
gered, see “Canceling the
alarm” (Y page 73).
Safety and security
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