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Home >> Mercedes Benz >> 2001 >> E430 Base >> Repair and Diagnosis >> Body & Frame >> Towing Systems >> Frame, Trailer Operation - 210 Chassis >> Retrofitting & Conversion >> Connect wiring harness - AN31.19-P-8080-03FFA

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

Vehicles with Parktronic system (code 220) 

    1. Remove grommet (16) (is no longer needed).

      Connection schematic for wiring harness 

      Fig 1: Connection Schematic For Wiring Harness
      G04624560

    Routing diagram for wiring harness 

    Fig 2: Routing Diagram For Wiring Harness
    G04624561
  2. Place trailer coupling wiring harness (1) with branch-off line to trailer coupling socket in the spare wheel recess.
  3. Connect the brown line (br) to ground (left taillamp in luggage compartment)(W6/1)(see magnified section).
  4. Route trailer hitch wiring harness (1) along the rear end center assembly to the hole (22) and fix in position.

    IMPORTANT Attach wiring harness with wide felt tape to longitudinal member (see arrow).

    Fig 3: Identifying Trailer Coupling Wiring Harness, Brown Line And Left Taillamp In Luggage Compartment
    G04624562

    5. Vehicles with Parktronic system (code 220) 

      • Slit the grommet (16) and insert the trailer hitch wiring harness (1) into the grommet (16).
      • Reinstall the grommet (16) and seal with Terrastat for example.

      2. Vehicles without Parktronic system (code 220) 

      • Mark center of hole from end of rear cross member and from floor panel of connection longitudinal member down onto spare wheel well.
      • Drill hole to dia. 38 mm.
        Fig 4: Identifying Trailer Hitch Wiring Harness And Grommet
        G04624563
    3. Route the trailer hitch wiring harness (1) with grommet (17) through the hole and seal in the spare wheel well with a second grommet (18).
  6. Plug 3-pin coupling and 13-pin coupling from trailer hitch wiring harness (1) into socket housing (10) and seal with grommet (17).

    IMPORTANT It should be ensured that the sealing lip of the grommet (17) abuts the socket housing (10) without any creases.

  7. Fasten the socket housing (10) to the bracket (19) of the trailer hitch using three 4.832 x 32 mm sheet metal screws.
  8. Fasten trailer hitch wiring harness (1) to bracket (19) using Omega clip (see arrow in Figure on top left).

    Shown on model 203 

    Fig 5: Identifying Trailer Hitch Wiring Harness, Grommet, Bracket And Socket Housing
    G04624564
  9. Widen recess clearance to dimensions in shield
    Fig 6: Identifying Shield Dimensions Clearance
    G04624565
  10. Route trailer coupling wiring harness (1) along existing wiring to control module rack on left wheelhouse and fix in place (figure on left).
  11. Route trailer coupling wiring harness (1) below control module rack (see arrow in figure on right) and through opening on left next to seat backrest and fix in place.
    Fig 7: Identifying Trailer Coupling Wiring Harness, Ground (Left Taillamp In Trunk), Brown And Hole
    G04624566
  12. Route trailer hitch wiring harness (1) along existing lines over the left wheelhouse 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 rear fuse box (F4).
  14. Fasten lines with adhesive pads and tie straps supplied (Figure on left).
    Fig 8: Identifying Trailer Coupling Wiring Harness, Fuse Box And Fuse Block
    G04624567

    15. Vehicles without fuse block (B) 

      • Insert the fuse block (B) supplied
      • Insert plug of 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 cable lug of the red line (rt) to the positive battery terminal (see magnified section on the left).
    Fig 9: Identifying Fuse Block And Red Cable
    G04624568

    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 Red\Blue Line, Fuse Block And Rear Fuse Box
    G04624569
  17. Assign fuse position 12 with a 25A fuse (arrow).

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

    Fig 11: Identifying Rear Fuse Box
    G04624570
  18. Route the brown/white cable (br/ws) behind the rear fuse box (F4) to the pneumatic control unit with combined functions (A37) and connect by means of tie straps supplied.
  19. Detach and open white coupling from pneumatic control unit with combined functions (A37) (see magnified section).

    20. Vehicle up to 28.02.1997 

      • 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 

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

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

      Fig 12: Locating White Coupling
      G04624571
  21. Expose black/green line (sw/gn) and black/white line (sw/ws) from the cable duct and check with the 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
    G04624572
  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 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) 

      • 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/Green Line And Trailer Hitch Wiring Harness
    G04624573

    25. All vehicles 

  25. Expose gray/green line (gr/gn) for rear fog lamp from the cable duct and cut through.
  26. Connect green/white line end (gn/ws) from the trailer hitch wiring harness (1) by means of a voltage distributor to the gray/green line end (gr/gn) which comes 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 Trailer Hitch Wiring Harness, Rear Fog Lamp Switchover Control Module And Rear Fog Lamp
    G04624574
  28. Route the trailer hitch wiring harness (1) along the cable duct to the left A-pillar.
  29. 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 Trailer Hitch Wiring Harness, Light Module And Exterior Lamp Switch
    G04624575
  30. Place bracket (10) into spare wheel.
  31. Place ball head (12) into recess clearance of (10) (figure on left).
  32. Glue operating instructions plate (13) onto the trunk sill (figure on right).
    Fig 17: Identifying Bracket, Ball Head
    G04624576
    Fig 18: Identifying Instruction Plate
    G04624577
  33. Insert the plugs supplied into holes (2l) and (2r).
    Fig 19: Identifying Plug Holes
    G04624578
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