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Connect wiring harness - AN31.19-P-8080-03FF

  1. Remove grommet (18) (is no longer needed).

    Connection schematic for wiring harness 

    Fig 1: Connection Schematic For Wiring Harness
    G04624542

    Routing diagram for wiring harness 

    Fig 2: Routing Diagram For Wiring Harness
    G04624543

    Vehicles with Parktronic system (code 220) 

    1. -Slit the existing grommet (23) and insert trailer hitch wiring harness (1) into the grommet.

      -Insert grommet in the hole (24) and seal.

      2. Vehicles without Parktronic system (code 220) 

    2. -Remove blind plug (23) from the hole (24).

    Shown on vehicle without Parktronic system (code 220) 

    Fig 3: Identifying Existing Grommet, Trailer Hitch Wiring Harness And Grommet Inserting Hole
    G04624544

    3. All vehicles 

  3. Insert 3-pin coupling and 13-pin clutch from trailer hitch wiring harness (1) in the socket housing (10) and seal with grommet (17)n.

    IMPORTANT Ensure that the sealing fold of the grommet (17) contacts the socket housing (10) without any creases.

  4. Fasten the socket housing (10) to the bracket (19) of the trailer hitch using three 4.8x32 mm sheet metal screws.
  5. Fasten the trailer hitch wiring harness (1) to the eyes of the crossmember (20) using tie straps (see arrows).
  6. Guide trailer coupling wiring harness (1) through the hole on the underfloor (see detail) and place into storage area recess.

    Shown on model 203 

    Fig 4: Identifying Socket Housing, Trailer Hitch Wiring Harness, Seal With Grommet And Bracket
    G04624545
  7. Route trailer coupling wiring harness (1) along the longitudinal member through opening (see arrow) and onto the wheelhouse and fix in place with felt strips.
  8. To extend the ground branch off line on the trailer hitch wiring harness (1), prepare an 800 mm long line with 2.5 mm2 with a 6 mm dia round cable lug in each case.
  9. Connect the extended ground line (21) to the ground cable branch-off line from the trailer hitch wiring harness (1) with a soldered connector (see magnified section).

    IMPORTANT Cut the round cable lug off the ground branch-off line on the trailer hitch wiring harness (1).

    Fig 5: Identifying Trailer Hitch Wiring Harness And Extended Ground Line
    G04624546
  10. Route the extended ground line (21) from the trailer hitch wiring harness (1) along existing lines to the left taillamp and fix in position.
  11. Fasten cable lug to ground (left taillamp in luggage compartment) (W6/1).
    Fig 6: Identifying Trailer Hitch Wiring Harness And Extended Ground Line
    G04624547
  12. Route trailer hitch wiring harness (1) along existing lines over the left wheelhouse (Figure on left) to the left cable duct and fix in position up to the branch-off line (see arrow in Figure on right).
  13. Route cable branch off lines, red/blue (rt/bl) and brown/white (br/ws) to the rear fuse box (F4).
  14. Fasten cables with adhesive pads and tie straps supplied (Figure on left).
    Fig 7: Identifying Trailer Hitch Wiring Harness
    G04624548
    Fig 8: Identifying Trailer Hitch Wiring Harness
    G04624549

    15. Vehicles without fuse block B 

    1. - Insert the fuse block (B) supplied.

      - Insert plug of the red auxiliary line (rt) in the free chamber E of the plug position 12 in the fuse block B (see magnified section on right).

      - Route red cable (rt) along existing cables to battery positive terminal and fix in place.

      - Fasten the cable lug of the red line (rt) to the positive battery terminal (see magnified section on the left).

    Fig 9: Identifying Red Cable And Fuse Block
    G04624550

    16. All vehicles 

  16. Insert red/blue line (rt/bl) in the free chamber (D) of the plug position 12 in the fuse block (B).
    Fig 10: Identifying Fuse Block And Rear Fuse Box
    G04624551
  17. In the rear fuse box F4) assign the fuse plug position 12 with a 25A fuse (arrow).

    IMPORTANT It should be pointed out to the customer that fuse 12 must only be fitted when towing a trailer, otherwise a remote consumer could discharge the battery.

    Fig 11: Identifying Rear Fuse Box
    G04624552
  18. Route the brown/white cable (br/ws) behind the rear fuse box (F4) to the pneumatic control unit with combined functions (A37) and fasten by means of the adhesive pads and tie straps supplied.
  19. Detach the white coupling from the pneumatic control unit with combined functions (A37) and open (see magnified section).

    20. Vehicle up to 28.02.1997 

    1. - Insert brown/white cable (br/ws) into free contact 2 of white coupling (see arrow in detail).

      IMPORTANT If chamber 2 is assigned, adapt the brown/white line (br/ws) with voltage distributor to the line from chamber 2 a (Remove plug-in sleeve  ).

      2. Vehicles as of 01.03.1997 

    2. - Insert brown/white cable (br/ws) onto free contact 15 of white coupling (see arrow).

    IMPORTANT If chamber 15 is assigned, adapt the brown/white cable (br/ws) to the line from chamber 15 with voltage distributor (Remove plug-in sleeve  ).

    Fig 12: Locating White Coupling
    G04624553
  21. Expose the black/green line (sw/gn) and black/white line (sw/ws) from the cable duct and check with multimeter signal.

    IMPORTANT Left rear turn signal lamp has cable color black/green (sw/gn), Right rear turn signal lamp has cable color black/white (sw/ws).

    Fig 13: Identifying Cable Harness For Trailer Hitch
    G04624554
  22. Connect the black/green line (sw/gn) from the trailer hitch wiring harness (1) to the black/green line (right rear turn signal lamp) by means of a voltage distributor (see magnified section).
  23. Connect the black/white line (sw/ws) from the trailer hitch wiring harness (1) to the black/white line (left rear turn signal lamp) by means of a voltage distributor (see magnified section).

    24. Vehicles with Parktronic system (code 220) 

    1. - Expose brown/white line from the cable duct.

      - Expose brown/white line from the trailer hitch wiring harness (1).

      - Connect the lines by means of a voltage distributor (see magnified section).

      Fig 14: Identifying Black\White Line And Trailer Hitch Wiring Harness
      G04624555

    25. All vehicles 

  25. Expose gray/green line (gr/gn) for rear fog lamp from the cable duct and cut through.
  26. Connect the green/white line end (gn/ws) from the trailer hitch wiring harness (1) to the gray/green line end (gr/gn) by means of voltage distributor, coming from the light module (N7-1)
  27. Connect gray/green line end (gr/gn) from the trailer hitch wiring harness (1) by means of a voltage distributor to the gray/green line end (gr/gn) which goes to the left taillamp (E3)
    Fig 15: Identifying Rear Fog Lamp And Rear Fog Lamp Switchover Control Module
    G04624556
  1. 29 Route the trailer hitch wiring harness (1) along the cable duct to the left A-pillar.
  2. 30 Route the black 10-pin coupling to the light module (N7-1) behind the exterior lamp switch (26) and fit in a free chamber.

    IMPORTANT Coupling is coded.

    Fig 16: Identifying Light Module, Trailer Hitch Wiring Harness And Exterior Lamp Switch
    G04624557
  3. 31 Place bracket (10) into spare wheel and attach with threaded connection (14).
  4. 32 Place ball head (12) into bracket (10) and attach with retaining strap (25).
    Fig 17: Identifying Threaded Connection, Ball Head, Retaining Strap And Bracket
    G04624558

    5. Shown on 210.0 

  5. 33 Glue on operating instructions plate (13) to paneling of rear end door.
    Fig 18: Identifying Instruction Plate
    G04624559
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