Installing Main Wire Harness

Installing main wire harness















1. Fasten main wire harness at centre dashboard bracket.
1.1. Lay main wire harness and fasten with four new tie-wraps.







2. Fasten main wire harness at right dashboard bracket.
2.1. Clip in main wire harness on both cable guides.







3. Fasten main wire harness at left dashboard bracket.
3.1. Clip in main wire harness on cable guide.
3.2. Insert fastening screw and tighten fastening nut. - Tightening torque: 3.5 Nm (2.5 ftlb.)







4. Fasten holder for relay carrier.
4.1. Position holder for relay carrier and tighten with the two fastening screws to the dashboard bracket. - Tightening torque: 3.5 Nm (2.5 ftlb.)







5. Clip in cable guide on dashboard bracket.







6. Clip in length compensation at the steering column.
6.1. Position length compensation at the steering column and fasten with the expansion rivet.







7. Fasten ground points on dashboard bracket.
7.1. Fit ground straps and tighten with fastening nuts. - Tightening torque: 9 Nm (6.5 ftlb.)

8. Push on connector for antenna amplifier, left and right -89 to 93-.







9. Remove protective film of adhesive strip on main wire harness -area A- and affix main wire harness to A-pillar.







10. Clip in main wire harness at front of roof frame.







11. Clip in cable duct at front of roof frame.







12. Connect plug connection of make-up mirror, left and right -87 and 88-.
12.1. Connect plug connection -arrows A- until it engages securely.
12.2. Clip plug connection into console -arrow B-.

13. Connect plug connection -86- until it engages securely.






14. Connect plug connections between main wire harness and wire harness for heater/air-conditioning unit -79 and 80-.
14.1. Lay main wire harness to heater/air-conditioning unit wire harness and fix with a tie-wrap.







14.2. Push in upper electric plug connection at heater/air-conditioning unit until it engages securely.







14.3. Push in lower electric plug connection at heater/air-conditioning unit until it is felt to engage.

15. Push on connector for tilt sensor control unit -77- until it engages securely.







16. Fasten ground point under the unit carrier -76-.
16.1. Connect ground straps and tighten with the fastening nut. - Tightening torque: 9 Nm (6.5 ftlb.)

17. Push on connector for pedal sensor -69- until it engages securely.
18. Push on connector for brake light switch -68- until it engages securely.
19. Push on connectors of KESSY/PAS control unit -66 and 67- until they engage securely.
20. Push on connector on Gateway control unit -65- until it engages securely.
21. Push together plug connection between main wire harness and wire harness for door at the left and right -59 and 60- until they engage securely.







22. Clip in wire harness at door sill.







23. Fasten ground point under the passenger seat -54-.
23.1. Connect ground straps and tighten with the fastening nut. - Tightening torque: 9 Nm (6.5 ftlb.)

24. Push on connectors for telephone control unit -50 to 53- until they engage securely.







24.1. Clip in wire harness for telephone control unit.







25. Clip in wire harness under driver's seat.







26. Fasten ground point under the driver's seat -49-.
26.1. Connect ground straps and tighten with the fastening nut. - Tightening torque: 9 Nm (6.5 ftlb.)

27. Push on connectors on control unit for rear convenience systems -46 to 48- until they engage securely.
28. Push on connectors on Park Assist control unit -44 and 45- until they engage securely.
29. Push on connectors for centre airbag sensor at the left and right -42 and 43- until they engage securely.
30. Push on connector on Tiptronic control unit -41- until it engages securely and lock it.







30.1. Clip in wire harness for Tiptronic control unit.

31. Fit rubber sleeves -39 and 40- and push on connector for front seat-belt pretensioners at the left and right -37 and 38-.







32. Connect plug connection between main wire harness and rear wire harness at the left and right -33 and 34- and lock it.

Completing the vehicle







1. Install left and right support.
1.1. Position the support and engage in lower side member.







1.2. Press in the locating peg -1- of the support and check it is seated correctly.
1.3. Tighten the fastening nut -3- and fastening screws -2-. - Tightening torque: 7.2 Nm (5.5 ftlb.)

2. Lay the floor covering over the support and engage.

INFORMATION: Ensure that belt strap can run properly.







3. Fasten seat belt mount at left and right.
3.1. Tighten fastening screw -2-, seat belt with fitting -3- and spacer sleeve -4- on inner lower side member. - Tightening torque: 50 Nm (37 ftlb.)
3.2. Press in -1- cap.

Installing front main wire harness







1. Push through main wire harness in direction of plenum panel.
2. Fit grommets -41- centre, left and right.







3. Clip in wire harness on end plate under windscreen at the two retaining clips -arrow-.







4. Push on connector for fuel level sender -40- -Arrow A- and lock -Arrow B-.







5. Position battery retaining bracket and secure with the four fastening nuts. - Tightening torque: 10 Nm (7.5 ftlb.)

6. Push on connector for alarm horn -39- until it is felt to engage.
7. Push on connector for wiper motor -38- until it is felt to engage.

INFORMATION: Only for vehicles with TPM.

8. Push connector onto front angle sensor for headlight beam adjustment -34- until it is felt to engage.
9. Push on connectors for windscreen washer system spray nozzle, left and right -32 and 33- until they are felt to engage.







10. Connect plug connections for PASM, front left and right -30 and 31- until they are felt to engage.
11. Push B+ line -29- onto mounting point at the power distributor as far as the stop. Check B+ line sits firmly.

INFORMATION: Only for vehicles with I number 536

12. Push on connector for alarm siren -28- until it is felt to engage.
13. Push on connector for pressure switch -27- until it is felt to engage.
14. Push on connector of vertical sensor -26- until it is felt to engage.
15. Push on connector for radio antenna -25- until it felt to engage.
16. Push on connector for GPS antenna -24- until it is felt to engage.







17. Clip in wire harness for end plate under windscreen at the three retaining clips -arrow-.

INFORMATION: Only in the cabriolet.

18. Push in connector for rod antenna -23- until it is felt to engage.
19. Push on connector for tank filler neck -22-.
20. Push on connector for filler flap switching element -21- until it is felt to engage.
21. Push on connectors of front antenna for tyre pressure monitoring system -19 and 20- at left and right until they are felt to engage.
22. Lay and connect ABS wire harness, front left and right -17 and 18-.
22.1. Laying ABS wire harness
22.2. Tighten fastening screw of connector socket. - Tightening torque: 10 Nm (7.5 ftlb.)
22.3. Lock the plug connection securely.

23. Push through main wire harness in direction of luggage compartment.
24. Fit grommets -16- left and right.







25. Clip in wire harness to CD changer/navigation unit -arrows-.







26. Clip in wire harness to loudspeaker amplifier -Arrows A- and fix with new adhesive tape -Arrow B-.







27. Clip in wire harness for front end control unit -arrow-.
28. Push on connector for tyre pressure monitoring system control unit -15- until it is felt to engage.
29. Push on connector for brake fluid sender -14- until it is felt to engage.
30. Push on connector for hydraulic unit -13- and lock it.
31. Push together plug connection between main wire harness and front-end wire harness, left -12- until it engages securely. Clip in connector socket.







32. Secure ground point left -11-.
32.1. Connect ground straps and tighten fastening nut. - Tightening torque: 9 Nm (6.5 ftlb.)







33. Push connector onto fuse box for fan -2-.
33.1. Push connector onto fuse box for fan -Arrow A-.
33.2. Close lid -Arrow B- until it is felt to engage.
33.3. Position bottom of fuse box for fan on the clip -Arrow C- and clip in -Arrow D-.







34. Push together plug connection between main wire harness and front end wire harness, right -1-.
34.1. Insert connector socket in the holder and turn anti-clockwise 90°.
34.2. Push together plug connection between front-end wire harness and main wire-harness right -Arrow A- and lock -Arrow B-.

Subsequent work

INFORMATION: Only in the cabriolet.

1. Install front headliner.
2. Secure front headliner in windscreen area.
3. Install sunroof motor.
4. Install operator control unit for garage door opener.
5. Install vehicle electrical system control unit.
6. Install relay carrier 1.
7. Install B+ line from power distributor to transmission connection point.
8. Secure fuse box.
9. Install rear side trim panel at left and right.
10. Install left and right scuff plate.
11. Install front seat at left and right.
12. Install heating/fresh-air unit.
13. Install dashboard.
14. Install tank for windscreen washer system.
15. Install front cover.
16. Install front wheel housing liner on left and right.
17. Install front-end control unit.
18. Install trim panels for luggage compartment.
19. Install loudspeaker amplifier.
20. Install navigation unit with retaining frame.
21. Install CD changer.
22. Install plenum panel cover.
23. Install battery.