Anti-theft systems
Immobiliser
The immobiliser prevents your vehicle from being started without the correct key.
Activating the immobiliser
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With the key: remove the key from the ignition lock.
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With KEYLESS GO*: press the KEYLESS GO button on the selector lever.
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The engine switches off.
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Deactivating the immobiliser
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With the key: turn the key to position 2 in the ignition lock.
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With KEYLESS GO*: press the KEYLESS GO button on the selector lever twice without depressing the brake.
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The immobiliser is always deactivated when you start the engine.
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ATA (anti-theft alarm system)
A visual and audible alarm is triggered if the alarm system is primed and you open:
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a door
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a door using the emergency key element
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the boot lid
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the bonnet
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the glove compartment
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the stowage space under the armrest
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a stowage compartment in the rear
The alarm is not switched off even if you close an open door again.
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 | Indicator lamp |
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To prime: lock the vehicle using the key. On vehicles with KEYLESS GO*, the locking button on the door handle/boot lid can also be used.
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Indicator lamp flashes. The alarm system is primed after approximately 15 seconds.
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To deactivate: unlock the vehicle using the key. On vehicles with KEYLESS GO*, you can also unlock the vehicle by opening the door/boot lid.
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Switching off the alarm
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With the key: insert the key into the ignition lock.
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The alarm is switched off.
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or |
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Press the 
or  button on the key.
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The alarm is switched off.
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With KEYLESS GO*: grasp the outside door handle. The key must be outside the vehicle.
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The alarm is switched off.
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or |
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Press the KEYLESS GO button on the selector lever. The key must be inside the vehicle.
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The alarm is switched off.
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Tow-away protection
An audible and visual alarm is triggered if your vehicle's angle of inclination is altered while tow-away protection is primed. This happens if the vehicle is jacked up on one side, for example.
Priming tow-away protection
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Lock the vehicle using the key. On vehicles with KEYLESS GO*, the locking button on the door handle/boot lid can also be used.
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Tow-away protection is primed after approximately 30 seconds.
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To deactivate tow-away protection
When you unlock your vehicle using the key or KEYLESS GO*, tow-away protection is automatically deactivated.
Deactivate tow-away protection manually to prevent a false alarm if your vehicle:
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is being transported
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is being loaded, e.g. onto a ferry or car transporter
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is being parked on a movable surface, e.g. split-level garages
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| To deactivate tow-away protection |
 | Indicator lamp |
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Remove the key from the ignition lock.
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Press button .
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Indicator lamp lights up briefly.
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Lock the vehicle using the key. On vehicles with KEYLESS GO*, the locking button on the door handle/boot lid can also be used.
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Tow-away protection remains deactivated until the vehicle is unlocked and locked again.
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Interior motion sensor*
If the interior motion sensor is primed, a visual and audible alarm is triggered if movement is detected in the vehicle interior while the vehicle is locked. This occurs, for example, if someone breaks the side windows of your vehicle or reaches into the vehicle's interior.
Priming the interior motion sensor
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Make sure that:
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the side windows are closed
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the roof is closed
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the stowage compartments under the armrest are closed
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there are no objects, e.g. mascots, hanging on the rear-view mirror or on the grasp handles on the roof trim.
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This will prevent false alarms.
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Make sure that the boot lid is closed.
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Only then can the interior motion sensor be primed.
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Lock the vehicle using the key. On vehicles with KEYLESS GO*, the locking button on the door handle/boot lid can also be used to lock the vehicle.
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The interior motion sensor is primed after approximately 30 seconds.
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The factory setting is that the interior motion sensor is not primed if the roof is open. You can use the on-board computer to change the settings so that the interior motion sensor is primed even when the roof is open more.
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You should always close the roof when you park your vehicle to prevent a false alarm being triggered, for example by falling leaves or insects. In certain countries, the interior motion sensor is primed even when the roof is open.
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Do not place any objects on the armrest in the centre console. This could otherwise interfere with the interior motion sensor.
Metallic objects coming into contact with other metallic objects may trigger a false alarm. Therefore, do not leave objects such as a bunch of keys in or next to the armrest. Use a different lockable stowage compartment for such items.
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To deactivate the interior motion sensor
To prevent a false alarm, deactivate the interior motion sensor if you lock your vehicle and
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| Indicator lamp |
| To deactivate the interior motion sensor |
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Remove the key from the ignition lock.
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Press button .
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Indicator lamp flashes briefly.
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Lock the vehicle using the key. On vehicles with KEYLESS GO*, the locking button on the door handle/boot lid can also be used.
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The interior motion sensor remains deactivated until the vehicle is unlocked and locked again.
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