Removing

WM 970919 Removing and installing main wiring harness - floor area and left-hand side

Removing main wiring harness - floor area and left-hand side

Overview





Information

- The repair instructions document "Main wire harness" is divided into several sections because of its size.

- For body repairs, refer to the specific sections on installing and removing individual sections of wiring.

CAUTION

-> The main wire harness contains all airbag lines, antenna lines and optical waveguides.
-> The main wire harness must therefore not be cut for major repair work and must be replaced complete.
-> If individual lines are damaged, isolate them (disconnect, remove plug contacts from plug connections etc.) and replace the original wire harness by installing new lines.

Removing main wiring harness - floor area and left-hand side

Disconnect the battery => 90 Work instructions after disconnecting the battery.

Remove side trim panel for rear luggage compartment.=> 700319 Removing and installing side trim panel for rear luggage compartment - section on "Removing"

Remove left rear light.=> 943119 Removing and installing rear light - section on "Removing"

Remove rear seat => 724819 Removing and installing rear seat - section on "Removing".

Remove left B-pillar trim panel => 706719 Removing and installing B-pillar trim panel - section on "Removing".

Remove front left side-section trim panel=> 702419 Removing and installing front side-section trim panel - section on "Removing".

Remove subwoofer => 913619 Removing and installing subwoofer - section on "Removing".

Remove auxiliary battery => 270719 Removing and installing auxiliary battery - section on "Removing".

Remove floor carpeting from the work area.

CAUTION

Danger of injury and material damage if airbag units are not handled correctly. Always observe the safety regulations for handling airbag units.=> 69 Safety regulations for handling airbag and.

- Remove ignition key. Disconnect battery. Route or isolate the ground strap so that all contact with a ground carrier (e.g. body, seat frame) is avoided => 90 Work instructions after disconnecting the battery.
- After the battery is disconnected, always wait for 1 minute before disconnecting the airbag plugs.

-> 1. Lift vehicle => 40 Lifting the vehicle.

Only for vehicles with off-road stabiliser and/or tyre pressure monitoring system
2. Release plug connection for off-road stabiliser (rear wheel housing) -1- -Arrow A- and disconnect it -Arrow B-.





3. Release connector of antenna for tyre pressure monitoring system (rear wheel housing) -2- -Arrow C- and disconnect it -Arrow D-.
4. Release plug connection (roof rack rear) -Arrow A- and disconnect -Arrows B-.





5. Press out rubber sleeve and line upwards -Arrow C- and remove.

Only for vehicles with rear-differential lock.





6. Release both connectors on servo motor for rear-differential lock (rear differential) -Arrows A- and disconnect -Arrow B-.
7. Cut tie-wrap -C-.

Only in vehicles with Bi-XENON headlights





8. Release connector on angle sensor (rear wheel suspension) -Arrows A- and remove -Arrow B-.
9. Release both connectors (above angle sensor for headlight levelling system) -Arrows A- and remove them -Arrows B-.





10. Unplug centre (black) connector -arrow- (D-pillar lower right).





11. Unclip line on rear cross member -Arrows A-.





12. Release both connectors -Arrows B- and pull them off -Arrows C-.
13. Press down lock on plug socket (head airbag) -Arrow A- and maintain in this position.





14. Release the connector -Arrow B- and pull it off -Arrow C-.
15. Unclip the line -arrows- (D-pillar lower left).





16. Unscrew fastening nut (luggage compartment rear left) -1- and remove ground strap together with twist lock -a- (-arrow-).





17. Unscrew fastening nut (roof rack rear) -1- and remove ground strap together with twist lock.





18. Pull off connector (pink) -arrow-.
19. Unclip line along pneumatic spring housing -Arrows A-.





20. Pull line behind head airbag down and out -Arrows B-.
21. Cut tie-wrap -A- and unclip line on C-pillar -Arrows B-.





Only for vehicles with rear-differential lock.





22. Release connector on control unit for rear-differential lock (left rear wheel housing) -Arrow A- and disconnect -Arrow B-.
23. Remove line together with guides from the threaded bolts -arrows- (rear wheel housing).





24. Press down the protective cover on the connector (seat belt at C-pillar) -Arrow A- and maintain in this position.





25. Release connector -Arrow B- and disconnect -Arrow C-.
26. Unscrew fastening nut and remove ground strap together with twist lock protection from ground pin.
27. Release connector (cutoff relay for auxiliary battery) -Arrow A- and disconnect -Arrow B-.





28. Undo fastening nuts -2- and remove cutoff relay -arrow-.





29. Turn the cutoff relay, then release the left cover -Arrows A- and open -Arrow B-.





30. Unscrew fastening nut -3- on cutoff relay and remove line from threaded bolt -Arrow C-.
31. Remove line with rubber sleeve from bracket -Arrow D-.

Information

- The retaining pivots -a- are easily broken. So hold the housing firmly when removing the cover.





32. Release cover over fuse element for auxiliary battery (spare-wheel well) with a small screwdriver -Arrows A- and remove -Arrow B-.
33. Undo fastening nut -4- and remove the line -Arrow C-.
34. Remove line together with rubber sleeve -Arrow A- (spare-wheel well).





35. Remove cover from threaded bolts -Arrow B -.
36. Cut open tie-wraps -C- and remove the cover.
37. Remove line (along left wheel housing) from threaded bolts -arrows-.





38. Cut the two tie-wraps -A- (under rear seat).





39. Release connectors -Arrow B- and remove them from fixing clip -Arrow C-.
40. Open clip -Arrow D- and remove line from threaded bolt -Arrow E-.
41. Unscrew fastening screws -5- and remove rear seat support -Arrow F-.
42. Open tie-wrap (lower C-pillar) -Arrow A-.





43. Remove line from threaded bolt -Arrow B-.
44. Unscrew fastening nut -1- and remove ground straps together with twist lock -a- from threaded bolt.
45. Press out rubber sleeve (under rear seat) -arrow- and remove line upwards.





46. Remove airbag sensor on rear wheel housing => 695119 Removing and installing airbag sensor - section on "Removing".
47. Remove wiring duct (lower C-pillar) from threaded bolt and wheel housing seam -arrows-.





Only for vehicles with electric adjustment fitting.





48. Press down protective cover (B-pillar) on connector -Arrow A- and maintain in this position.
49. Release connector -Arrow B- and pull off -Arrow C-.
50. Unscrew fastening nut -1- and remove ground straps together with twist lock -a- -Arrow D-.
51. Cut tie-wrap -a- (B-pillar).





52. Unclip cover at the top -Arrow A- and remove -Arrow B-.

A- & B-pillar





53. Release wire sleeve with a small screwdriver -Arrows A- and press away to the rear -Arrow B-.
54. Release connector for door wire harness -Arrows C- and pull off -Arrow D- connector.

A- & B-pillar





55. Release socket bracket -Arrows A- and remove -Arrow B-.
56. Release sockets -Arrows C- and pull out to the rear -Arrows D-.
57. Unclip line -arrows- (lower B-pillar).





58. Remove connector from airbag sensor at B-pillar => 695119 Removing and installing airbag sensor.
59. Remove wiring duct (rear door floor area) from threaded bolts -arrows-.





60. Undo fastening nut -2- (central electrical system power distributor) and remove the line -Arrow A-.





Only for vehicles with auxiliary battery
61. Open cover -Arrow B-
62. Undo fastening nuts -3- and remove line -Arrow C-.
63. Loosen wire harness in central electrical system power distributor => 979419 Removing and installing central electrical system power distributor.
64. Remove wiring duct (rear door floor area) from threaded bolts -Arrows A-.





65. Cut the tie-wraps -B-.

Remove main wire harness - dashboard area and centre console => 970919 Removing and installing main wire harness - section on "Removing".