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

MODEL 164.1 /8 with CODE (550) Trailer hitch with CODE (494) USA version 

Shown on model 164.1 

Fig 1: Trailer Antitheft Alarm Function Diagram

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Function requirements 

• The rear SAM control unit (N10/8) has detected the coupled trailer.
• The vehicle is locked and the anti-theft alarm system 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 

The rear SAM control unit cyclically energizes the right and left stop lamp of the trailer via the trailer hitch socket (7-pin) for monitoring.

The electronics of the rear SAM control unit detect a discontinuity in the stop lamp circuit.

The rear SAM control unit evaluates the signal and triggers the acoustic and visual alarm:

• The rear SAM control unit directly actuates the alarm signal horn and illumination devices at the rear of the vehicle for the acoustic and visual alarm.
• Activated via the CAN message from CAN-B, the front SAM control unit (N10) switches on the visual alarm of the illumination devices at the front of the vehicle.