Trailer antitheft alarm, function - GF82.10-P-3016GZ

MODELS 164.1 with CODE (550) Trailer hitch except CODE (494) USA version 

Interlinkage of components 

Fig 1: Trailer Antitheft Alarm Function Diagram

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Function requirements 

• The rear SAM control unit has detected the connected trailer.
• The vehicle is locked and the anti-theft alarm system is activated (for anti-theft alarm system (ATA [EDW]), code 551).
• The rear SAM control unit has detected the activated antitheft alarm system (for anti-theft alarm system (ATA [EDW]), code 551).

Function sequence 

To monitor it, the rear SAM control unit cyclically energizes the trailer's right and left stop lamp via the trailer hitch socket (13-pin).

The electronic circuit of the rear SAM control unit detects a discontinuity in the stop lamp circuit.

The rear SAM control unit analyzes the signal and triggers the acoustic and optical alarm:

• The rear SAM control unit directly actuates the alarm signal horn with additional battery and lamps on the rear of the vehicle for an acoustic and optical alarm.
• Actuated via the CAN message from CAN-B, the front SAM control unit (N10) switches on the optical alarm of the lamps on the rear of the vehicle.