A-Class Interactive Owner's Manual

Anti-theft systems

Immobiliser

The immobiliser prevents your vehicle from being started without the correct key.

  

To activate: remove the key from the ignition lock.

  

To deactivate: turn the key to position 2 in the ignition lock.

 

ATA* (anti-theft alarm system)

A visual and audible alarm is triggered if the alarm system is primed and you open:

  • a door

  • a door using the emergency key element

  • the tailgate

  • the bonnet

The alarm is not switched off even if you close a door again.

Indicator lamp
  

To prime: lock the vehicle using the key.

 

Indicator lamp flashes. The alarm system is primed after approximately 15 seconds.

  

To deactivate: unlock the vehicle using the key.

Switching off the alarm

  

Insert the key into the ignition lock.

 

The alarm is switched off.

or
  

Press the  or  button on the key.

 

The alarm is switched off.

 

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

  

Lock the vehicle using the key.

 

Tow-away protection is primed after approximately 30 seconds.

To deactivate tow-away protection

Tow-away protection is automatically deactivated when you unlock your vehicle using the key.

Deactivate tow-away protection manually to prevent a false alarm if your vehicle:

  • is being transported

  • is being loaded, e.g. onto a ferry or car transporter

  • is being parked on a movable surface, e.g. split-level garages

To deactivate tow-away protection
Indicator lamp
  

Remove the key from the ignition lock.

  

Press button .

 

Indicator lamp lights up briefly.

  

Lock the vehicle using the key.

 

Tow-away protection remains deactivated until the vehicle is unlocked and locked again.

 

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

  

Make sure that:

  • the side windows are closed

  • the panorama louvred sliding sunroof* is closed

  • there are no objects, e.g. mascots, hanging on the rear-view mirror or on the grasp handles on the roof trim.

 

This will prevent false alarms.

  

Lock the vehicle using the key.

 

The interior motion sensor is primed after approximately 30 seconds.

To deactivate the interior motion sensor

To prevent a false alarm, deactivate the interior motion sensor if you lock your vehicle and

  • people or animals remain in the vehicle

  • the windows remain open

  • the panorama louvred sliding sunroof* remains open

To deactivate the interior motion sensor
Indicator lamp
  

Remove the key from the ignition lock.

  

Press button .

 

Indicator lamp  flashes briefly.

  

Lock the vehicle using the key.

 

The interior motion sensor remains deactivated until the vehicle is unlocked and locked again.