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" 94491900 Removing and installing front control unit
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" Service and Repair
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" Service and Repair
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" 94491900 Removing and installing front control unit
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" Service and Repair
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" 443819 Removing and installing antenna for Tyre Pressure Monitoring (TPM)
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" Service and Repair
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-.