Routing, connecting wiring harness - AZ54.65-P-0001-06FA

Model 210.2 as of 1.7.99 model year 99 

Ultrasonic backup assist wiring harness (9) 

Fig 1: Identifying Routing, Connecting Wiring Harness

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

1. Disconnect purple/white cable (vi/ws) and tie up together with the circuit loop of the grey cable (gr).
2. Connect 28-pin and 12-pin coupling (9a, 9b) to control module (1).
   Fig 2: Connecting 28-Pin And 12-Pin Coupling (9A, 9B) To Control Module

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
3. Connect ground cable with round cable socket to ground (left wheelhousing in trunk) (W6).
4. Disconnect connector from left taillamp.
5. Connect 6-pin white coupling of ultrasonic sensors (10) to the cable from the bumper.
   Fig 3: Identifying Ultrasonic Sensors

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
6. Solder red cable (rt) of ultrasonic backup assist wiring harness (9) onto grey/yellow cable (gr/ge) to left taillamp and insulate.

   Check grey/yellow cable (gr/ge) of backup signal or consult wiring diagram.

   Fig 4: Identifying Wiring Harness Cable

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
7. Insert 1500 Ω resistance (9e) into coding housing (3) and additionally secure with a cable strap.

   Never replace resistance (9e) with a fuse  .

8. Connect black cable (sw) of wiring harness (9) with flat-type connector and black/white cable (sw/ws) with flat-type coupling so that the warning tone volume is set to low.

   If the black cable (sw) with flat-type connector is not  connected to the black/white cable (sw/ws) with a flat-type connector, the maximum volume of the warning tone is set.

   Fig 5: Identifying Wiring Harness Connector

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
9. Route the branch-off line from the wiring harness (9) to the display instrument with the 6-pin black coupling (2c) to the left D-pillar as shown in the figure and fix in position with adhesive felt.
   Fig 6: Identifying Control Module And Ground (Left Wheelhousing In Trunk)

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

For vehicles without trailer coupling only 

10.1 Insulate and tie up free purple cable (vi) of the wiring harness (9).

For vehicles with trailer coupling only 

10.2 Solder purple cable (vi) of the wiring harness (9) onto the brown/white cable (br/ws) of the trailer coupling wiring harness in the left wheelhousing.

When the trailer socket is plugged in, the brown/white cable (br/ws) supplies a ground signal which then switches off the backup assist. (When the trailer coupling is retrofitted the brown/white cable (br/ws) can also be tied up in the wheelhousing).

Fig 7: Identifying Wiring Harness Cable

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.