Anti-theft alarm system (ATA [EDW]), function (MODEL 204.0/2 as of model year 2009, MODEL 204.3, MODEL 204.9 with code 551)- GF80.50-P-0001CE

MODEL 204.0/2 with code (551) Anti-theft alarm system (ATA [EDW]) as of model year 2009/YoM 08

MODEL 204.3 with code (551) Antitheft alarm system (ATA [EDW])

MODEL 204.9 with code (551) Antitheft alarm system (ATA [EDW])

Fig 1: Anti-Theft Alarm System Function Diagram

Courtesy of MERCEDES-BENZ USA

Antitheft alarm system (ATA [EDW]), general

The ATA [EDW] monitors all relevant inputs after locking the vehicle with the central locking (CL) for their non-actuated state. If a change of status is detected at one of the monitored inputs, an acoustic and visual alarm is given.

The acoustic alarm signals are output up to 31.5.10 and as of 1.6.10 without code (494) USA version, via the alarm siren and as of 1.6.10 with code (494) USA version via the horns. The visual alarm signals are output by the exterior lights. In addition the interior illumination is switched on.

The rear SAM control unit is the master control unit for the ATA [EDW].

The ATA [EDW], when armed, monitors:

Doors
Trunk lid (model 204.0/3) or liftgate (model 204.2/9)
Engine hood
Alarm siren (up to 31.5.10 and as of 1.6.10 without code (494) USA version)
Position change of vehicle (tow-away protection) (without code (494) USA version and without code (460) Canada version or without code (498) Japan version)
Motion in interior compartment (interior protection) (with code (882) Interior monitoring (only with ATA [EDW]))
Rear side window and rear window (model 204.2/9 with code (882) Interior monitoring (only with ATA [EDW]))

The ATA [EDW] comprises the following partial function, which are described in separate documents:

Activate anti-theft alarm system, function
Anti-theft alarm system trigger, function
Alarm triggering by panic switch, function (with code (763) Radio remote control with panic switch)

Activate antitheft alarm system, function		GF80.50-P-2002CE
Anti-theft alarm system trigger, function		GF80.50-P-2004CE
Triggering alarm with panic switch, function	with code (763) Radio remote control with panic switch	GF80.50-P-3014CEU