Installing Main Wire Harness In Passenger Compartment

Fig 1: Overview Of Connectors For Main Wire Harness In Dashboard

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1. 1-3  - Connector for steering column switch
2. 4  - Connector for main light switch
3. 5  - Connector for ignition lock
4. 6  - Connector for diagnostic box
5. 7  - Connector for footwell light, left
6. 8  - Connector for instrument cluster
7. 9-10  - Connector for passenger's airbag, stage 1 and stage 2
8. 11  - Connector for footwell light, right
9. 12  - Plug connection for glove box
10. 13  - Connector for stopwatch
11. 14  - Connector for sun sensor
12. 15  - Connector for center speaker
13. 16-17  - Connector for loudspeaker, left and right
14. 18  - Connector for switch console
15. 19-20  - Connector for climate control
16. 21-26  - Connector for PCM
17. 27  - Connector for central locking
18. 28  - Connector for hazard warning light switch
19. 29-30  - Plug connection for illumination of center nozzle
20. 31-32  - Plug connection for illumination of left and right nozzle

Fig 2: Overview Of Connectors For Main Wire Harness In Passenger Compartment

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1. 33-34  - Plug connection between main wire harness and rear wire harness, left and right
2. 35-36  - Connector for loudspeaker, rear left and right
3. 37-38  - Connector for front seat-belt pretensioner, left and right
4. 39-40  - Rubber sleeve
5. 41  - Connector for Tiptronic control unit
6. 42-43  - Connector for airbag sensor, center left and right
7. 44-45  - Connector for ParkAssist control unit
8. 46-48  - Connector for control unit for rear convenience systems
9. 49  - Ground point under driver's seat
10. 50-53  - Connector for telephone control unit
11. 54  - Ground point under passenger's seat
12. 55-56  - Connector for front seat, left and right
13. 57  - Connector for driver's seat with memory
14. 58  - Connector for door sill button module
15. 59-60  - Plug connection between main wire harness and wire harness for door, left and right
16. 61  - Fuse box
17. 62  - Relay carrier
18. 63-64  - Connector for vehicle electrical system control unit
19. 65  - Connector for gateway control unit
20. 66-67  - Connector for KESSY/PAS control unit
21. 68  - Connector for brake light switch
22. 69  - Connector for pedal sensor
23. 70  - Plug connection between main wire harness and wire harness for center console
24. 71  - Plug connection for telephone handset
25. 72  - Connector for airbag triggering unit
26. 73  - Connector for parking-brake lever contact switch
27. 74-75  - Tiptronic position switch
28. 76  - Ground point under unit carrier
29. 77  - Connector for tilt sensor control unit
30. 78  - Power distributor
31. 79-80  - Plug connection between main wire harness and wire harness for heater/air-conditioning unit
32. 81-82  - Connector for garage door opener control unit
33. 83  - Connector for sunroof switch
34. 84  - Connector for interior light
35. 85  - Connector for sunroof motor
36. 86  - Plug connection for rain sensor
37. 87-88  - Plug connection for make-up mirror, left and right
38. 89-93  - Connector for antenna unit, left and right

1. Fasten main wire harness at center dashboard bracket.
   Fig 3: Installing Main Wire Harness At Center Dashboard Bracket

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   1. 1.1. Lay main wire harness and fasten with four new tie-wraps.
2. Fasten main wire harness at right dashboard bracket.
   Fig 4: Installing Main Wire Harness At Right Dashboard Bracket

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   1. 2.1. Clip in main wire harness on both cable guides.
3. Fasten main wire harness at left dashboard bracket.
   Fig 5: Installing Main Wire Harness At Left Dashboard Bracket

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   1. 3.1. Clip in main wire harness on cable guide.
   2. 3.2. Insert fastening screw and tighten fastening nut. → Tightening torque: 3.5 Nm (2.5 ft. lb.) 
4. Fasten holder for relay carrier.
   Fig 6: Installing Holder For Relay Carrier

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   1. 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 ft. lb.) 
5. Clip in cable guide on dashboard bracket.
   Fig 7: Clipping In Cable Guide

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6. Clip in length compensation at the steering column.
   Fig 8: Clipping In Length Compensation

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   1. 6.1. Position length compensation at the steering column and fasten with the expansion rivet.
7. Fasten ground points on dashboard bracket.
   Fig 9: Installing Ground Points On Dashboard Bracket

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   1. 7.1. Fit ground straps and tighten with fastening nuts. → Tightening torque: 9 Nm (6.5 ft. lb.) 
8. Push on connector for antenna amplifier, left and right -89 to 93-  . → 918419 REMOVING AND INSTALLING ANTENNA AMPLIFIER - section on "Installing"
9. Remove protective film of adhesive strip on main wire harness -area A-  and affix main wire harness to A-pillar.
   Fig 10: Locating Main Wire Harness Area Of A-Pillar

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10. Clip in main wire harness at front of roof frame.
    Fig 11: Clipping In Main Wire Harness At Front Of Roof Frame

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11. Clip in cable duct at front of roof frame.
    Fig 12: Clipping In Cable Duct At Front Of Roof Frame

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12. Connect plug connection of make-up mirror, left and right -87 and 88-  .
    Fig 13: Connecting Plug Connection Of Mirror

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    1. 12.1. Connect plug connection -arrows A-  until it engages securely.
    2. 12.2. Clip plug connection into console -arrow B-  .
13. Connect plug connection -86-  until it engages securely. → 921219 REMOVING AND INSTALLING RAIN SENSOR - section on "Installing"
14. Connect plug connections between main wire harness and wire harness for heater/air-conditioning unit -79 and 80-  .
    Fig 14: Identifying Electric Line

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    1. 14.1. Lay main wire harness to heater/air-conditioning unit wire harness and fix with a tie-wrap.
    2. 14.2. Push in upper electric plug connection at heater/air-conditioning unit until it engages securely.
       Fig 15: Connecting Upper Electric Plug Connection

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    3. 14.3. Push in lower electric plug connection at heater/air-conditioning unit until it is felt to engage.
       Fig 16: Connecting Lower Electric Plug Connection

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15. Push on connector for tilt sensor control unit -77-  until it engages securely. → 966319 TILT SENSOR CONTROL UNIT - section on "Removing"
16. Fasten ground point under the unit carrier -76-  .
    Fig 17: Securing Ground Point

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    1. 16.1. Connect ground straps and tighten with the fastening nut. → Tightening torque: 9 Nm (6.5 ft. lb.) 
17. Push on connector for pedal sensor -69-  until it engages securely. → WM 208019 REMOVING AND INSTALLING ACCELERATOR PEDAL (ALL MODELS) - section on "Installing" 
18. Push on connector for brake light switch -68-  until it engages securely. → 943619 REMOVING AND INSTALLING BRAKE LIGHT SWITCH - section on "Installing".
19. Push on connectors of KESSY/PAS control unit -66 and 67-  until they engage securely. → 966619 REMOVING AND INSTALLING KESSY CONTROL UNIT - section on "Installing"
20. Push on connector on Gateway control unit -65-  until it engages securely. → 903519 REMOVING AND INSTALLING GATEWAY CONTROL UNIT - section on "Installing"
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. → 973219 REMOVING AND INSTALLING WIRE HARNESS FOR DOOR  - section on "Locking"
22. Clip in wire harness at door sill.
    Fig 18: Clipping In Wire Harness At Door Sill

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23. Fasten ground point under the passenger seat -54-  .
    Fig 19: Securing Ground Point

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    1. 23.1. Connect ground straps and tighten with the fastening nut. → Tightening torque: 9 Nm (6.5 ft. lb.) 
24. Push on connectors for telephone control unit -50 to 53-  until they engage securely. → 919019 REMOVING AND INSTALLING CONTROL UNIT FOR TELEPHONE - section on "Installing"
    1. 24.1. Clip in wire harness for telephone control unit.
       Fig 20: Clipping In Wire Harness For Telephone Control Unit

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25. Clip in wire harness under driver's seat.
    Fig 21: Clipping In Wire Harness Under Driver Seat

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26. Fasten ground point under the driver's seat -49-  .
    Fig 22: Securing Ground Point

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    1. 26.1. Connect ground straps and tighten with the fastening nut. → Tightening torque: 9 Nm (6.5 ft. lb.) 
27. Push on connectors on control unit for rear convenience systems -46 to 48-  until they engage securely. → Installing Control Unit For Rear Convenience Systems - section on "Installing".
28. Push on connectors on ParkAssist control unit -44 and 45-  until they engage securely. → 917419 REMOVING AND INSTALLING PARKASSIST CONTROL UNIT - section on "Installing"
29. Push on connectors for center airbag sensor at the left and right -42 and 43-  until they engage securely. → Installing Airbag Sensor - section on "Installing"
30. Push on connector on Tiptronic control unit -41-  until it engages securely and lock it. → 373019 REMOVING AND INSTALLING TRANSMISSION CONTROL UNIT - section on "Installing"
    1. 30.1. Clip in wire harness for Tiptronic control unit.
       Fig 23: Clipping In Wire Harness For Tiptronic Control Unit

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31. Fit rubber sleeves -39 and 40-  and push on connector for front seat-belt pretensioners at the left and right -37 and 38-  . → Installing Front Three-Point Belt - section on "Installing"
32. Connect plug connection between main wire harness and rear wire harness at the left and right -33 and 34-  and lock it.
    Fig 24: Connecting Plug Connection For Main To Rear Wire Harness

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