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 gear 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 gear selector lever twice without depressing the brake pedal.
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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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the boot lid
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the bonnet
The alarm is also triggered if a door or the boot is opened with the emergency key.
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The alarm is not switched off even if you close an open door again.
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To switch on: lock the vehicle with the key or, on vehicles with KEYLESS GO*, with the locking button on the door handle.
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Indicator lamp  in tow-away protection button*  flashes. The alarm system is primed after approximately 15 seconds.
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To deactivate: unlock the vehicle using the key or, on vehicles with KEYLESS GO*, 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*: pull 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.
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The tow-away protection alarm is triggered if the vehicle is jacked up on one side, for example.
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Activating tow-away protection
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Lock the vehicle with the key or, on vehicles with KEYLESS GO*, with the locking button on the door handle.
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Tow-away protection is primed after approximately 30 seconds.
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Deactivating tow-away protection
Tow-away protection is automatically deactivated when you unlock your vehicle with the key or with KEYLESS-GO*.
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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
This will prevent false alarms.
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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 with the key or, on vehicles with KEYLESS GO*, with the locking button on the door handle.
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Tow-away protection remains deactivated until you unlock and lock the vehicle again.
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Interior motion sensor* (Coupé)
A visual and audible alarm is triggered if your vehicle is locked and a movement is detected in the vehicle interior, e.g. if someone breaks your vehicle's side window or reaches into the vehicle interior.
Activating the interior motion sensor
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Make sure that the side windows and the sliding/tilting sunroof* are closed.
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This will prevent false alarms.
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Lock the vehicle with the key or, on vehicles with KEYLESS GO*, with the locking button on the door handle.
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The interior motion sensor is primed after approximately 30 seconds.
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Do not leave anything, e.g. mascots, hanging on the rear-view mirror or on the grab handles on the roof lining. These could otherwise trigger false alarms.
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Deactivating the interior motion sensor
Deactivate the interior motion sensor if you lock your vehicle and:
This will prevent false alarms.
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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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 | Risk of injury |
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Do not leave children unsupervised in the vehicle. They could open the doors, release the parking brake or injure themselves on moving parts, thus endangering themselves and others.
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The interior motion sensor remains deactivated until you unlock and lock the vehicle again.
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Interior motion sensor* (Cabriolet)
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The interior motion sensor is only available in certain countries.
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A visual and audible alarm is triggered if your vehicle is locked and a movement is detected in the vehicle interior, e.g. if someone breaks your vehicle's side window or reaches into the vehicle interior.
Activating the interior motion sensor
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Make sure the side windows and the stowage compartments under the top of the armrest are closed.
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This will prevent false alarms.
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Make sure the soft top is closed.
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This will prevent false alarms. In some countries this is necessary to switch on the interior motion sensor.
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Lock the vehicle with the key or, on vehicles with KEYLESS GO*, with the locking button on the door handle.
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The interior motion sensor is primed after approximately 30 seconds.
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In some countries the interior motion sensor is activated even if the soft top is open. The vehicle should only be parked with the soft top closed, however, to prevent false alarms in the event of falling leaves or insects for example.
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Do not leave any objects, such as mascots, attached to the rear-view mirror. These could otherwise trigger false alarms.
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Do not leave any objects on the top of the armrest on the centre console. The interior motion sensor could otherwise be impaired.
Do not leave any metallic objects which are touching each other, such as a bunch of keys, lying around in or next to the top of the armrest or the stowage compartment between the rear seats. These could otherwise trigger false alarms. Use a different lockable stowage compartment for that purpose.
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Deactivating the interior motion sensor
Deactivate the interior motion sensor if you lock your vehicle and:
This will prevent false alarms.
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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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| Risk of injury |
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Do not leave children unsupervised in the vehicle. They could open the doors, release the parking brake or injure themselves on moving parts, thus endangering themselves and others.
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The interior motion sensor remains deactivated until you unlock and lock the vehicle again.
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