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Anti-theft alarm system (ATA [EDW]), function - GF80.50-P-0001SX

MODEL 221.0 /1, 216.3 with CODE (551) Anti-theft alarm system (ATA [EDW]) up to Model Year 8 

The anti-theft alarm system (ATA) monitors all relevant inputs for their non-actuated state If it detects a change of state in one of the monitored inputs, it triggers a country-specific acoustic and visual alarm.

The acoustic signals are output by the alarm signal horn with additional battery (H3/1). The visual signals are output country-specific by means of the exterior lights. In addition, the interior illumination (front and rear) is switched on via the overhead control panel control unit (N70). When the panic alarm is activated (only USA ONLY with code (763) Radio remote control with panic alarm), the interior illumination is not activated in contrast to the ATA.

The rear SAM control unit with rear fuse and relay module (N10/2) has the master function for the ATA.

IMPORTANT The national functions and alarm outputs can be set with the vehicle programming.

The ATA, when armed, monitors:

ATA activated by: 

Alarm inputs 

The ATA evaluates the following alarm inputs:

Function 

After the central locking (CL) is closed, the EIS control unit (N73) transmits the message "Vehicle locked" to the rear SAM control unit, which then activates the ATA. The outer right ATA function display (N72/1e2) in the upper control panel control unit (N72/1) flashes. The status of the alarm inputs is checked cyclically (every 0.4 s). If the polls indicate that an input is at rest within 10 s, the corresponding input is then armed. Alarm inputs set later to the non-actuated state (e.g. if the trunk lid is closed only after the vehicle has been locked), are also armed 10 s after closing. The turn signal feedback flashes three times only after the last door and trunk lid are closed.

Partial activation of ATA 

Function requirement 

Function 

The tow-away protection and the interior protection (with code (882) Interior monitoring (with ATA only)) can be deactivated using the COMAND control unit (A40/3) or the free programming button (A40/9s10) in the central front operating unit (A40/9). The interior protection and the tow-away sensor can be deactivated or activated independently from the selected circuit status. This makes it possible, for example, to deactivate the corresponding function while driving. Deactivation is only valid for the following activation. It is reset with ignition "ON" (c. 15) or each time the ATA is deactivated. Exceptions are activations after

The previous status is restored during these procedures.

Tow-away protection 

The tow-away protection is activated 10 seconds after the closing command of the EIS control unit and only after the last door and the trunk lid are locked. The inclination sensor is integrated into the alarm signal horn and communicates with the rear SAM control unit. When the inclination sensor is defective or not connected, the full function of all other ATA components is maintained.

Interior protection 

(with code (882) Interior monitoring (with ATA only))

The ultrasonic echo sounder sensor is activated 10 s after the last door or the trunk lid is locked. The ultrasonic echo sounder sensor is ready for an alarm after an additional 20 seconds; this time is required for it to measure the interior compartment for reference purposes.

Automatic relocking 

The automatic relocking function is actuated by the EIS control unit.

If the vehicle is unlocked and neither a door nor the trunk lid is opened within 40 s, the vehicle relocks automatically. Relocking is not signaled by the turn signal lamps. The rear SAM control unit arms the ATA when the EIS control unit is relocked. The interior protection and tow-away protection are set to the same status as before the opening procedure

Special case: Driver door 

If the driver door is still open when the ATA is activated, the left front door lock unit (A85) on model 221 or left door lock unit (A85) on model 216 is not actuated and the door remains unlocked. After the driver door is closed, the door status is transmitted to the rear SAM control unit and the alarm input is included in the poll cycle leading to alarm actuation when the driver door is opened without previously deactivating the ATA.

Automatic activation (only BELGIUM ONLY )

Activation for the Belgium national version is supplemented so that the ATA is completely disarmed following a delay time of 120 s after the transmitter key is removed and the driver door is opened/ closed. This is accomplished regardless of central locking.

Special case: Acoustic feedback following successful activation (only NETHERLANDS ONLY )

In addition to the visual feedback, the alarm signal horn with additional battery outputs an acoustic signal by buzzing momentarily. If one door is not properly closed during ATA [EDW] activation, no feedback will be given.

Deactivating ATA 

The ATA can be deactivated by:

The corresponding signals from the EIS control unit are read in by the rear SAM control unit, which deactivates the ATA.

Special case: Acoustic deactivation feedback (only NETHERLANDS ONLY )

The alarm signal horn with additional battery outputs an acoustic feedback by buzzing once.

Anti-theft alarm system (ATA [EDW]), block diagram   GF80.50-P-0001-01SX 
Anti-theft alarm system (ATA), location of components   GF80.50-P-0001-02SX 
Anti-theft alarm system trigger, function   GF80.50-P-2004SX 
Triggering alarm with panic switch, function On vehicles with code (494) USA version
with CODE (763) Radio remote control with panic switch		 GF80.50-P-3014SXU 
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