Part 1
WM 970919 Removing and installing main wire harness
Technical values
Preliminary work
1. Remove battery. -> 270619 Removing and installing battery - section on "Removing" 27061900 Removing and installing battery
2. Remove plenum panel cover. -> 852219 Removing and installing cover - section on "Removing" 85221900 Removing and installing cover
3. Remove CD changer.
4. Remove navigation unit with retaining bracket
5. Remove loudspeaker amplifier.
6. Remove front luggage compartment linings. -> 700519 Removing and installing trim panel for front luggage compartment - section on "Removing"
7. Remove front-end control unit. -> 944919 Removing and installing front-end control unit - section on "Removing" Service and Repair
8. Remove front wheel housing liner on left and right. -> 505619 Removing and installing front wheel housing liner - section on "Removing" Service and Repair
9. Remove front cover. -> 519219 Removing and installing front cover - section on "Removing" 519219 Removing and installing Cover For Front Underbody
10. Remove tank for windscreen washer system. -> 926019 Removing and installing tank for windscreen washer system - section on "Removing" Service and Repair
11. Remove rear luggage-compartment lining.
12. Remove relay carrier. -> 979019 Removing and installing relay carrier - section on "Removing" 97901900 Removing and installing relay carrier
13. Remove rear wheel housing liner.
14. Remove convertible top and water drip pan.
15. Remove rear side trim panel at left and right. -> 707519 Removing and installing rear side trim panel - section on "Removing" 707519 Removing and installing side trim panel
16. Remove auxiliary brake light. -> 947019 Removing and installing auxiliary brake light - section on "Removing" 94701900 Removing and Installing Auxiliary Brake Light
17. Remove dashboard. -> 701819 Removing and installing dashboard - section on "Removing" 701819 Removing and installing instrument panel
18. Remove heating/fresh-air unit. -> 851519 Removing and installing heating/fresh-air unit - section on "Removing" Service and Repair
19. Remove front seat at left and right. -> 720119 Removing and installing front seat - section on "Removing" 720119 Removing and Installing Front Seat
20. Remove left and right scuff plate. -> 680519 Removing and installing inner door sill trim - section on "Removing"
21. Loosen fuse box. -> 978409 Loosening and securing fuse box - section on "Loosening" 97840900 Loosening and securing fuse box
22. Remove B+ line from power distributor to engine connection point. -> 974519 Installing and removing wire harness for starter battery - section on "Removing" 97451900 Removing and installing wire harness for battery wiring
23. Remove relay carrier 1. -> 978319 Removing and installing relay carrier 1 - section on "Removing" 97831900 Removing and installing relay carrier 1
24. Remove vehicle electrical system control unit. -> 971019 Removing and installing vehicle electrical system control unit - section on "Removing" 97101900 Removing and installing vehicle electrical system control unit
25. Remove operator control unit for garage door opener. -> 967819 Removing and installing operator control unit for garage door opener - section on "Removing" 96781900 Removing and installing control unit for garage door opener
26. Remove front roof lining. -> 708419 Removing and installing headliner - section on "Removing"
Preliminary work
1. Remove battery. -> 270619 Removing and installing battery - section on "Removing" 27061900 Removing and installing battery
2. Remove plenum panel cover. -> 852219 Removing and installing cover - section on "Removing" 85221900 Removing and installing cover
3. Remove CD changer.
4. Remove navigation unit with retaining bracket.
5. Remove loudspeaker amplifier.
6. Remove trim panels for front luggage compartment. -> 700519 Removing and installing trim panel for front luggage compartment - section on "Removing"
7. Remove front-end control unit. -> 944919 Removing and installing front-end control unit - section on "Removing" Service and Repair
8. Remove front wheel housing liner on left and right. -> 505619 Removing and installing front wheel housing liner - section on "Removing" Service and Repair
9. Remove front cover. -> 519219 Removing and installing front cover - section on "Removing" 519219 Removing and installing Cover For Front Underbody
10. Remove tank for windscreen washer system. -> 926019 Removing and installing tank for windscreen washer system - section on "Removing" Service and Repair
11. Remove rear luggage-compartment lining.
12. Remove relay carrier. -> 979019 Removing and installing relay carrier - section on "Removing" 97901900 Removing and installing relay carrier
13. Remove rear wheel housing liner.
14. Remove left and right side trim panels. -> 707519 Removing and installing side trim panel - section on "Removing" 707519 Removing and installing side trim panel
15. Remove dashboard. -> 701819 Removing and installing dashboard - section on "Removing" 701819 Removing and installing instrument panel
16. Remove heating/fresh-air unit. -> 851519 Removing and installing heating/fresh-air unit - section on "Removing" Service and Repair
17. Remove front seat at left and right. -> 720119 Removing and installing front seat - section on "Removing" 720119 Removing and Installing Front Seat
18. Remove left and right scuff plate. -> 680519 Removing and installing inner door sill trim - section on "Removing"
19. Loosen fuse box. -> 978409 Loosening and securing fuse box - section on "Loosening" 97840900 Loosening and securing fuse box
20. Remove B+ line from power distributor to engine connection point. -> 974519 Removing and installing wire harness for starter battery - section on "Removing" 97451900 Removing and installing wire harness for battery wiring
21. Remove relay carrier 1. -> 978319 Removing and installing relay carrier 1 - section on "Removing" 97831900 Removing and installing relay carrier 1
22. Remove vehicle electrical system control unit. -> 971019 Removing and installing vehicle electrical system control unit - section on "Removing" 97101900 Removing and installing vehicle electrical system control unit
23. Remove operator control unit for garage door opener. -> 967819 Removing and installing operator control unit for garage door opener - section on "Removing" 96781900 Removing and installing control unit for garage door opener
24. Remove front roof lining. -> 708419 Removing and installing headliner - section on "Removing"
Removing main wire harness
Removing 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. Disconnect plug connections for main wire harness to rear wire harness -33 and 34-.
Disconnect plug connections for main wire harness to rear wire harness.
1.1. Release plug connections for main wire harness to rear wire harness -35 and 36- and -arrows A- disconnect.
2. Disconnect plug connections for main wire harness to engine wire harness.
Disconnecting plug connections for main wire harness to engine wire harness
2.1. Release plug connections for main wire harness to engine wire harness -arrows A- and disconnect -arrows B-.
2.2. Release sockets for main wire harness -arrows C- and push down from relay carrier -arrows D-.
3. Release connector for rear vertical sensor -37- and pull it off.
4. Release and pull off connector on DME control unit -38 and 39-. -> 247019 Removing and installing DME control unit - section on "Removing" Service and Repair
5. Loosen ground point in luggage compartment -40-.
Loosening ground point
5.1. Screw off fastening nut and remove ground strap.
6. Release and pull off connector on rear angle sensor for range adjustment -42-. -> 947919 Rear angle sensor for range adjustment - section on "Removing" 94791900 Removing and installing rear angle sensor for headlight levelling system
7. Remove rubber sleeves -43-.
8. Unclip main wire harness in rear luggage compartment.
Unclipping main wire harness in rear luggage compartment
9. Disconnect PASM plug connections -45 and 46- at the left and right.
Disconnecting PASM plug connections at the left and right
9.1. Remove PASM plug connections on the left and right from both holders -arrow B- , release -arrow a- and disconnect them -arrows C-.
9.2. Open both holders -arrow D- and take off from actuating cable.
9.3. Remove wire harness to motor for hood compartment lid mechanism from the holder -arrow B-.
10. Release connector on motor for hood compartment lid mechanism -47- and pull it off. -> 617019 Removing and installing motor for drive mechanism - section on "Removing" Service and Repair
11. Release and pull off connector on rear antenna for tyre pressure monitoring system -48 and 49- at the left and right. -> 443819 Removing and installing antenna for tyre pressure monitoring system - section on "Removing" 44381900 Removing and installing tyre pressure monitoring system antenna
12. Disconnect and expose ABS wire harness rear on left and right -50 and 51-. -> 976555 Replacing ABS wire harness - section on "Removing" 976555 Replacing wire harness for anti-lock brake system (ABS)
12.1. Release and disconnect plug connection for wheel sensor at the left and right.
12.2. Unscrew fastening screw of connector socket.
12.3. Release rear wire harness.
13. Unclip the main wire harness in the area of the rear left spring strut.
Unclipping the main wire harness in the area of the rear left spring strut
14. Release rear window heating plug connection -53- and disconnect it.
15. Release connector on hood mechanism -54- and pull it off.
16. Pull off connector on front seat-belt pretensioner at the left and right -56 and 57-. -> 691119 Removing and installing front three-point belt - section on "Removing" 691119 Removing and installing front three-point belt
17. Unclip main wire harness to the left side wall.
Unclipping main wire harness to the left side wall
17.1. Unclip main wire harness to the left side wall -arrow A-.
17.2. Unclip cable duct to the left side wall -arrow B-.
18. Loosen cable duct to the left side wall.
Loosening cable duct to the left side wall
18.1. Unclip main wire harness to the bottom of the B-pillar -arrow A-.
18.2. Take out cable duct upwards out of the rear wall plate -arrow B-.
19. Release and pull off connector for airbag sensor, centre left and right -58 and 59-. -> 695119 Removing and installing airbag sensor - section on "Removing" 69511900 Removing and installing airbag sensor
20. Release and pull off connector for ParkAssist control unit -60 and 61-. -> 917419 Removing and installing ParkAssist control unit - section on "Removing" Service and Repair
21. Release and pull off connector for control unit for rear convenience systems -62 to 64-. -> 578919 Removing and installing control unit for rear convenience systems - section on "Removing". Service and Repair
22. Loosen ground point under the driver's seat -65-.
Loosening ground point
22.1. Screw off fastening nut and remove ground straps.
23. Unclip ground point under driver's seat.
Unclipping ground point under driver's seat
24. Release and remove connectors for telephone control unit -66 to 69-. -> 919019 Removing and installing control unit for telephone - section on "Removing" 91901900 Removing and installing control unit for telephone
24.1. Unclip wire harness for telephone control unit.
Unclipping wire harness for telephone control unit
25. Loosen ground point under the passenger's seat -70-.
Loosening ground point
25.1. Screw off fastening nut and remove ground straps.
26. Unclip wire harness at door sill.
Unclipping wire harness at door sill
27. Disconnect the plug connection between main wire harness and wire harness for door, left and right -75 and 76-. -> 973219 Removing and installing wire harness for door - section on "Disconnecting" 97321900 Removing and installing wire harness for door
28. Release and pull off connector for gateway control unit -81-. -> 903519 Removing and installing gateway control unit - section on "Removing" 903519 Removing and installing gateway control unit
29. Release and pull off connectors for KESSY/PAS control unit -82 and 83-. -> 966619 Removing and installing KESSY control unit - section on "Removing" Service and Repair
30. Release and pull off connector for brake light switch -84-. -> 943619 Removing and installing brake light switch - section on "Removing". Service and Repair
31. Release and pull off connector for pedal sensor -85-.
32. Loosen ground point under the unit carrier -91-.
Loosening ground point
32.1. Screw off fastening nut and remove ground straps.
33. Release and pull off connector for tilt sensor control unit -92-. -> 966319 Tilt sensor control unit - section on "Removing" Service and Repair
34. Disconnect plug connections between main wire harness and wire harness for heater/air-conditioning unit -94 and 95-.
Releasing electric plug connection
34.1. Release lower plug connection on heater/air-conditioning unit -arrows a- and unplug.
34.2. Release upper plug connection on heater/air-conditioning unit -arrows a- and unplug.
Releasing plug connection
34.3. Cut tie-wraps (main wire harness to heater/air-conditioning unit wire harness) with side cutters. Remove main wire harness.
Cutting tie-wraps
35. Release and disconnect plug connection for rain sensor -100-. -> 921219 Removing and installing rain sensor - section on "Removing" Service and Repair
36. Disconnect plug connection of make-up mirror, left and right -101 and 102-.
Disconnecting plug connection of make-up mirror
36.1. Unclip plug connection from console -arrow B-.
36.2. Release plug connection -arrow a- and disconnect it -arrows C-.
37. Unclip cable duct at front of roof frame.
Unclipping cable duct at front of roof frame
38. Unclip main wire harness at front of roof frame.
Unclipping main wire harness at front of roof frame
39. Remove main wire harness from A-pillar -area A-.
Removing main wire harness from A-pillar
40. Pull off connector for antenna amplifier, left and right -103 to 107-. -> 918419 Removing and installing antenna amplifier - section on "Removing" Service and Repair
41. Loosen ground points on dashboard bracket.
Loosening ground points on dashboard bracket
41.1. Unscrew fastening nuts and remove ground straps.
42. Unclip length compensation at the steering column.
Unclipping length compensation
42.1. Remove expansion rivet and length compensation.
43. Unclip cable guide on dashboard bracket.
Unclipping cable guide
44. Loosen holder for relay carrier.
Loosening holder for relay carrier
44.1. Unscrew the two fastening screws and remove the relay carrier holder from the dashboard bracket.
45. Loosen main wire harness at left dashboard bracket.
Loosening main wire harness at left dashboard bracket
45.1. Screw off fastening nut and remove fastening screw.
45.2. Unclip main wire harness on cable guide.
46. Loosen main wire harness at right dashboard bracket.
Loosening main wire harness at right dashboard bracket
46.1. Unclip main wire harness on both cable guides.
47. Loosen main wire harness at centre dashboard bracket.
Loosening main wire harness at centre dashboard bracket
47.1. Undo the four tie-wraps and remove main wire harness.
Removing main wire harness in passenger compartment
Overview of main wire harness for dashboard
Overview of connectors for main wire harness in passenger compartment