Part 2
WM 970919 Removing and installing main wire harness
26. Release and pull off connectors for windscreen washer system spray nozzle, left and right -32 and 33-. -> 926619 Removing and installing spray nozzle for windscreen washer system - section on "Removing" Service and Repair
Information
Only for vehicles with TPM.
27. Release and pull off connector on front angle sensor for headlight beam adjustment -34-. -> 947819 Removing and installing front angle sensor for headlight beam adjustment - section on "Removing" 94781900 Removing and installing front angle sensor for headlight levelling system
28. Release and pull off connector on wiper motor -38-. -> 921519 Removing and installing wiper motor - section on "Removing" Service and Repair
29. Release and pull off connector on alarm horn -39-. -> 966519 Removing and installing alarm siren - section on "Removing" Service and Repair
30. Undo the four fastening nuts on the battery retaining bracket and remove the battery retaining bracket.
Removing and installing battery retaining bracket
31. Release connector on fuel level sender -40- -Arrow A- and pull it off -Arrow B-.
Pulling off tank connector
32. Unclip wire harness on end plate under windscreen at the two retaining clips -arrow-.
Unclipping wire harness
33. Remove grommets -41- in centre, and on left and right.
34. Pull through main wire harness in direction of interior.
Exposing main wire harness in passenger compartment
1. Loosen seat belt mount at left and right.
Undoing seat belt and fitting
1.1. Press off cap -1- with a screwdriver and unscrew the fastening screw -2-. Remove seat belt with fitting -3- and spacer sleeve -4-.
2. Disengage floor covering at the support and lay it in the vehicle interior.
3. Remove left and right support.
Unlocking locating peg using the removal tool
3.1. Unlock locating peg -1- of the support using the commercially available removal tool Disassembly tool, universal NR.21.
3.2. Unscrew fastening screws -2- and nuts -3- and carefully pull the support up and out of the retaining points.
Unscrewing fastening screws
Removing main wire harness in passenger compartment
Overview of main wire harness for dashboard
Overview of connectors for main wire harness in passenger compartment
1. Release plug connection between main wire harness and rear-end wire harness, left and right -33 and 34- -Arrow A- and disconnect.
Releasing plug connection between main wire harness and rear-end wire harness
2. Pull off connector for seat-belt tensioner, front left and right -37 and 38- and remove rubber sleeves -39 and 40-. -> 691319 Removing and installing front three-point seat belt with tensioner - section on "Removing" Testing and Inspection
3. Release and pull off connector on Tiptronic control module -41-. -> 373019 Removing and installing transmission control module - section on "Removing" Service and Repair
3.1. Unclip wire harness for Tiptronic control module.
Unclipping wire harness for Tiptronic control module
4. Release and pull off connector for airbag sensor, centre left and right -42 and 43-. -> 695119 Removing and installing airbag sensor - section on "Removing" 69511900 Removing and installing airbag sensor
5. Release and pull off connector for Park Assist control unit -44 and 45-. -> 917419 Removing and installing Park Assist control unit - section on "Removing"
6. Release and pull off connector for rear end convenience systems control unit -46 to 48-. -> 578919 Removing and installing control unit for rear end convenience systems - section on "Removing". Service and Repair
7. Loosen ground point under the driver's seat -49-.
Loosening ground point
7.1. Screw off fastening nut and remove ground straps.
8. Unclip ground point under driver's seat.
Unclipping ground point under driver's seat
9. Release and remove connectors for telephone control unit -50 to 53-. -> 919019 Removing and installing telephone control unit - section on "Removing" Service and Repair
9.1. Unclip wire harness for telephone control unit.
Unclipping wire harness for telephone control unit
10. Loosen ground point under the passenger's seat -54-.
Loosening ground point
10.1. Screw off fastening nut and remove ground straps.
11. Unclip wire harness at door sill.
Unclipping wire harness at door sill
12. Release and disconnect plug connection between main wire harness and wire harness for door, left and right -59 and 60-. -> 973219 Removing and installing wire harness for door - section on "Disconnecting" 97321900 Removing and installing wiring harness for door
13. Release and pull off connector for gateway control unit -65-. -> 903519 Removing and installing gateway control unit - section on "Removing" Service and Repair
14. Release and pull off connectors for KESSY/PAS control unit -66 and 67-. -> 966619 Removing and installing KESSY control unit - section on "Removing" Service and Repair
15. Release and pull off connector for stop light switch -68-. -> 943619 Removing and installing stop light switch - section on "Removing". Service and Repair
16. Release and pull off connector for pedal sensor -69-. -> 207819 Removing and installing pedal sensor - section on "Removing"
17. Loosen ground point under the unit carrier -76-.
Loosening ground point
17.1. Screw off fastening nut and remove ground straps.
18. Release and pull off connector for tilt sensor control unit -77-. -> 966319 Tilt sensor control unit - section on "Removing" Service and Repair
19. Disconnect plug connections between main wire harness and wire harness for heater/air-conditioning unit -79 and 80-.
Releasing electric plug connection
19.1. Release lower plug connection on heater/air-conditioning unit -Arrows a- and disconnect.
19.2. Release upper plug connection on heater/air-conditioning unit -Arrows a- and disconnect.
Releasing plug connection
19.3. Cut tie-wraps (main wire harness to heater/air-conditioning unit wire harness) with side cutters. Remove main wire harness.
Cutting tie-wraps
20. Release and disconnect plug connection for rain sensor -86-. -> 921219 Removing and installing rain sensor - section on "Removing" Service and Repair
21. Disconnect plug connection of make-up mirror, left and right -87 and 88-.
Disconnecting plug connection of make-up mirror
21.1. Unclip plug connection from console -Arrow B-.
21.2. Release plug connection -Arrow a- and disconnect it -Arrows C-.
22. Unclip cable duct at front of roof frame.
Unclipping cable duct at front of roof frame
23. Unclip main wire harness at front of roof frame.
Unclipping main wire harness at front of roof frame
24. Remove main wire harness from A-pillar -Area A-.
Removing main wire harness from A-pillar
25. Pull off connector for antenna amplifier, left and right -89 bis 93-. -> 918419 Removing and installing antenna amplifier - section on "Removing" Service and Repair
26. Loosen ground points on dashboard bracket.
Loosening ground points on dashboard bracket
26.1. Unscrew fastening nuts and remove ground straps.
27. Unclip length compensation at the steering column.
Unclipping length compensation
27.1. Remove expansion rivet and length compensation.
28. Unclip cable guide on dashboard bracket.
Unclipping cable guide
29. Loosen holder for relay carrier.
Loosening holder for relay carrier
29.1. Unscrew the two fastening screws and remove the relay carrier holder from the dashboard bracket.
30. Loosen main wire harness at left dashboard bracket.
Loosening main wire harness at left dashboard bracket
30.1. Screw off fastening nut and remove fastening screw.
30.2. Unclip main wire harness on cable guide.
31. Loosen main wire harness at right dashboard bracket.
Loosening main wire harness at right dashboard bracket
31.1. Unclip main wire harness on both cable guides.
32. Loosen main wire harness at centre dashboard bracket.
Loosening main wire harness at centre dashboard bracket
32.1. Undo the four tie-wraps and remove main wire harness.
Installing main wire harness
Installing main wire harness in passenger compartment
Overview of connectors for main wire harness in dashboard
Overview of connectors for main wire harness in passenger compartment
1. Fasten main wire harness at centre dashboard bracket.
Fastening 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.
Fastening 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.
Fastening 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.
Fastening 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.
Clipping in cable guide