97090902 Loosening and securing main wire harness in passenger compartment at the right
WM 970909 Loosening and securing main wire harness in passenger compartment at the right
General warning notes
Group 20 - Fuel supply, control
WARNING
Toxic substances
- Danger of poisoning or suffocation
-> Ventilate the work area well.
-> Never ingest or inhale.
-> Read specific information on the Hazard Sheet.
-> Wear personal protective gear.
WARNING
Highly inflammable or explosive materials
- Danger of fire or explosion
-> Avoid contact with hot parts or sources of ignition.
-> Use suction to remove ignitable vapours.
-> Attach warning sign in a clearly visible position.
Information
- Absorb any escaping fuel using a suitable binding material or a cloth.
- Cloths which have absorbed fuel must be disposed of according to the applicable national laws.
- The fuel system must be depressurised before starting work on it.
- Only work on the fuel system in well-ventilated rooms.
- Any seals which have been removed must always be replaced.
- Do not use any sealant containing silicone or silicone spray when the injection system is open. Traces of silicone drawn in by the engine are not combusted and damage the oxygen sensors.
Information
The main wire harness is manufactured individually depending on equipment.
- Fastening elements may be different from the parts described.
- The number of plug connections can vary, depending on equipment.
Preliminary work
Information
- For details of how to drain the fuel tank, see -> 2010EN Draining and filling the fuel tank Procedures
1. Disconnect the battery. -> 2X00IN Work instructions after disconnecting the battery - section on "Disconnecting" 2X00IN Work instructions after disconnecting the battery
2. Drain the fuel tank fully (both sides). -> 2010EN Draining and filling the fuel tank (draining and filling in fuel) - section on "Draining" Procedures
NOTICE
Incorrect handling of fuel tank
- Danger of cracking or damaging the fuel tank if handling instructions are not observed.
-> Drain the fuel tank fully before lowering it.
3. Remove restraining straps at the middle, left and right of the fuel tank and lower the fuel tank. Leave the fuel tank on the vehicle! -> 201019 Removing and installing fuel tank - section on "Removing" Removal and Replacement
4. Unclip fuel line -1- and fuel vent line -2- on the underbody at the right of the fuel tank.
Unclipping fuel line
5. Remove floor covering.
-> 704119 Removing and installing floor covering
6. Remove side cushion. -> 724919 Removing and installing side cushion - section on "Removing" 724919 Removing and installing side cushion
7. Remove C-pillar trim panel with sound absorber on passenger's side.
-> 706819 Removing and installing C-pillar trim panel 706819 Removing and installing C-pillar trim
8. Remove lower part of B-pillar trim panel on passenger's side. -> 70671903 Removing and installing lower part of B-pillar trim panel - section on "Removing" 70671903 Removing and installing lower part of B-pillar trim panel
9. Remove A-pillar trim panel on passenger's side. -> 705719 Removing and installing A-pillar trim panel - section on "Removing" 705719 Removing and installing A-pillar trim
10. Remove transmitter (trigger) for tyre pressure monitoring system (TPM).
-> 443619 Removing and installing TPM transmitter (trigger) 443619 Installing and removing TPM transmitter (trigger)
11. Remove air vent under passenger's seat.
-> 887519 Removing and installing air vent 887519 Removing and installing air vent
12. Remove control unit for fuel pump.
-> 207019 Removing and installing control unit for fuel pump Service and Repair
13. Detach relay carrier 1 under passenger's seat.
-> 978309 Detaching and securing relay carrier - section on "Detaching" Service and Repair
14. Remove headliner.
-> 708419 Removing and installing headliner 708419 Removing and installing roof trim panel
Loosening main wire harness in passenger compartment at the right
NOTICE
Incorrect handling of main wire harness
- Risk of damage to lines
-> The main wire harness contains all airbag lines, antenna lines and optical waveguides.
-> The main wire harness must not be separated and is always replaced as a complete wire harness when carrying out extensive repairs.
-> If individual lines are damaged, shut off these lines and install new lines. Lay the new lines along the main wire harness and secure them to the main wire harness.
Installation position of main wire harness in passenger compartment at the right
1. Release and pull off electric plug connection for seat heating for side cushion. -> 724919 Removing and installing side cushion - section on "Removing" 724919 Removing and installing side cushion
2. Remove cable cover at the wheel housing.
Removing cable duct from wheel housing
2.1. Unscrew fastening nut -1-.
2.2. Unclip fixing clip -2-.
2.3. Lift up cable cover -4- ( -arrow A- ).
2.4. Pull cable cover -4- out of the locking mechanism -3- ( -arrow B- ).
2.5. Loosen main wire harness.
3. Loosen rubber sleeve and release and disconnect electric plug connection for TPM transmitter (trigger). -> 443619 Removing and installing TPM transmitter (trigger) - section on "Removing" 443619 Installing and removing TPM transmitter (trigger)
4. Unclip and remove supply line to TPM transmitter (trigger).
5. Release and pull off electric plug connection for rear right airbag sensor. -> 695119 Removing and installing airbag sensor - section on "Removing" 695119 Removing and Installing Airbag Sensor
6. Remove cable cover on rear inner sill.
Removing cable cover on rear inner sill
6.1. Unscrew fastening screws -1- on cable cover. => Removing cable cover on rear inner sill
6.2. Remove cable cover. -arrows A and B-
7. Unclip main wire harness.
8. Detach rubber sleeve for fuel level sensor and fuel pump control unit.
9. Release and disconnect electric plug connection for fuel level sensor. -> 201519 Removing and installing fuel level sensor - section on "Removing" Service and Repair
10. Release and disconnect electric plug connection for fuel pump control unit -> 207019 Removing and installing fuel pump control unit - section on "Removing" Service and Repair.
11. Unclip and disconnect supply line to fuel level sensor and fuel pump control unit.
12. Release and disconnect electric plug connection for rear backrest.
13. Remove electric plug connection for door electrics.
Removing connector for door electrics
13.1. Open rear door of the vehicle and detach rubber protection on wiring arrangement for door electrics from the B-pillar.
13.2. Release mounting housing -1- ( -arrow A- ) and remove it from the B-pillar.
13.3. Release electric plug connection for door electrics -arrow B- and disconnect it -arrow C-.
13.4. Remove supply line for door electrics from the B-pillar.
14. Release and disconnect electric plug connection for air vent lighting at the B-pillar.
15. Release and disconnect electric plug connection for seat-belt pretensioner. -> 691119 Removing and installing front three-point belt - section on "Removing" 691119 Removing and installing front three-point belt
16. Release electric plug connection for seat connection -1- ( -arrow A- ) and remove it from the bracket -arrow B-.
Connector for seat connection and ground point
17. Loosen fastening nut for ground point -2- under the passenger's seat and remove supply line -arrow C-.
18. Unclip supply line for air-conditioning system sensor and servo motors for the rear footwell and release and disconnect electric plug connection -> 887519 Removing and installing air vent - section on "Removing" 887519 Removing and installing air vent.
19. Release cable duct on passenger's seat.
Releasing cable duct
19.1. Unscrew fastening nut -1- on passenger's seat.
19.2. Pull cable duct -arrow A- up and release it from the retaining clip.
20. Unclip and disconnect main wire harness at the front inner sill. -arrow A-
Unclipping main wire harness at the front inner sill
21. Loosen fastening nut -1- for ground point at the A-pillar and remove supply line -arrow-.
Disconnecting ground point at A-pillar
22. Release and disconnect electric plug connection for centre airbag sensor. -> 695119 Removing and installing airbag sensor - section on "Removing" 695119 Removing and Installing Airbag Sensor
23. Release cable duct at the A-pillar.
Releasing cable duct from A-pillar
23.1. Unscrew fastening nut -1- for cable duct.
23.2. Release cable duct -2- from the fixing clip by pulling it -arrow-.
24. Unclip and disconnect antenna supply line and antenna in the roof area. -> 912855 Replacing antenna lines - section on "Replacing" 91282400 Installing antenna lines
Securing main wire harness in passenger compartment at the right
1. Installation is performed in reverse order.
2. First lay the main wire harness loosely in the passenger compartment at the right, ensuring that it is positioned correctly.
3. Secure cable ducts.
4. Secure main wire harness in passenger compartment at the right as well as lines coming from it.
5. Plug in control units and electric plug connections until they engage securely.
6. Connect ground points.
7. Secure antenna.
8. Secure sound absorbers and trim panels.
Subsequent work
1. Install headliner.-> 708419 Removing and installing headliner - section on "Installing" 708419 Removing and installing roof trim panel
2. Secure relay carrier 1 under passenger's seat.-> 978309 Detaching and securing relay carrier - section on "Securing" Service and Repair
3. Install fuel pump control unit.-> 207019 Removing and installing fuel pump control unit - section on "Installing" Service and Repair
4. Install air vent under passenger's seat.-> 887519 Removing and installing air vent - section on "Installing" 887519 Removing and installing air vent
5. Install TPM transmitter (trigger).-> 443619 Removing and installing TPM transmitter (trigger) - section on "Installing" 443619 Installing and removing TPM transmitter (trigger)
6. Install A-pillar trim panel on driver's side. -> 705719 Removing and installing A-pillar trim panel - section on "Installing" 705719 Removing and installing A-pillar trim
7. Install lower part of B-pillar trim panel on driver's side. -> 70671903 Removing and installing lower part of B-pillar trim panel - section on "Installing" 70671903 Removing and installing lower part of B-pillar trim panel
8. Install trim panel with sound absorber for C-pillar on passenger's side.-> 706819 Removing and installing C-pillar trim panel - section on "Installing" 706819 Removing and installing C-pillar trim
9. Install side cushion. -> 724919 Removing and installing side cushion - section on "Installing" 724919 Removing and installing side cushion
10. Install floor covering.-> 704119 Removing and installing floor covering - section on "Installing"
11. Clip in fuel line and fuel vent line on the underbody at the right.
12. Lift up fuel tank and install restraining straps at the middle, left and right of the fuel tank.-> 201019 Removing and installing fuel tank - section on "Installing" Removal and Replacement
13. Fill the fuel tank (both sides).-> 2010EN Draining and filling the fuel tank (draining and filling in fuel) - section on "Filling" Procedures
14. Connect the battery. -> 2X00IN Work instructions after disconnecting the battery - section on "Connecting" 2X00IN Work instructions after disconnecting the battery