LEMON Manuals: Even more car manuals for everyone
Home >> Mercedes Benz >> 2010 >> ML350 Base >> Repair and Diagnosis (Single Page) >> Body & Frame >> Ignition Switch/Steering Lock >> Anti-Theft & Central Locking - 164 Chassis >> Basic Knowledge >> Trigger alarm with panic switch, function - GF80.50-P-3014GZU

Trigger alarm with panic switch, function - GF80.50-P-3014GZU

MODEL 164 with CODE (551) Anti-theft alarm system (ATA [EDW]) with CODE (494) USA version 

Switch on/off panic alarm 

Fig 1: Trigger Alarm With Panic Switch Function Diagram - Switch On/Off Panic Alarm
G05258694Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Trigger panic alarm 

When the "PANIC" transmitter button on the transmitter key is pressed for approx. 2 s, this signal is transmitted to the roof antenna module via radio. This is relayed to the EIS control unit via the rear SAM control unit. Parallel to the radio signal, an infrared signal is transmitted to the left front IR receiver (precise aiming required). This signal is read in by the left front door control unit and transmitted via CAN B to the EIS control unit which checks the access authorization.

In both cases, the EIS control unit checks the access authorization of the transmitter key. If the access authorization is valid, the EIS control unit transmits the request "Panic alarm" to the CAN B. The rear SAM control unit triggers a visual and acoustic alarm regardless of the ATA status.

IMPORTANT The panic alarm has priority over the ATA alarm.

Terminate panic alarm 

Visual alarm 

All visual signals are output via the vehicle and interior illumination for 180 s. The alarm output is controlled by the rear SAM control unit.

Visual signals are output via: 

Acoustic alarm 

Acoustic panic alarm is performed for 185 s by the:

  Front SAM control unit, component description   GF54.21-P-7010GZ
  Rear SAM control unit, component description   GF54.21-P-7030GZ
  Left front door control unit, component description   GF72.29-P-4141GZ
  Infrared remote control receiver, component description   GF80.30-P-6000GZ 
  Alarm signal horn, component description   GF80.50-P-6030GZU 
  Electronic ignition switch (EIS) control unit, component description   GF80.57-P-6000GZ 
  Transmitter key, component description   GF80.57-P-6010GZ 
  Overhead control panel control unit, component description   GF82.20-P-5216GZ
  Roof antenna module, component description   GF82.62-P-3127GZU