Undoing The Wire Harness In The Right Side Of Engine Compartment

→ 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.

Fig 1: Identifying Engine Compartment Wire Harness Installation Position (Right Side)

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1. 7  - Plug connection for air distribution flap change-over valve
2. 8  - Plug connection for right engine mount
3. 9  - Plug connection for oxygen sensor upstream of catalytic converter
4. 10  - Plug connection for oxygen sensor downstream of catalytic converter
5. 11  - Tail light, right
6. 12  - Plug connection for engine wire harness
7. 13  - Plug connection for engine wire harness
8. 14  - Plug connection for thermal management change-over valve
9. 15  - Plug connection for engine wire harness (2-pin)
10. 16  - Plug connection for exhaust system flaps change-over valve
11. 17  - Plug connection for rear right ABS wire harness

1. Disconnect engine mount plug connection.
   Fig 2: Disconnecting Engine Mount Plug Connection

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   1. 1.1. Unlatch plug connection -a-  and pull it off -B-  .
2. Disconnect oxygen sensor connectors in engine compartment.
   1. 2.1. Unlatch and pull off green plug connection (upstream of catalytic converter). → 246919 REMOVE AND INSTALL OXYGEN SENSOR UPSTREAM OF CATALYTIC CONVERTER
   2. 2.2. Unlatch and pull off grey plug connection (downstream of catalytic converter). → 247319 REMOVE AND INSTALL OXYGEN SENSOR DOWNSTREAM OF CATALYTIC CONVERTER
3. Disconnect plug connection for air distribution flap change-over valve.
   Fig 3: Disconnecting Plug Connection For Air Distribution Flap Change-Over Valve

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   1. 3.1. Unlatch plug connection -a-  and pull it off -B-  .
4. Disconnect plug connection for thermal management change-over valve.
   Fig 4: Disconnecting Plug Connection For Thermal Management Change-Over Valve

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   1. 4.1. Unlatch plug connection -a-  and pull it off -B-  .
5. Disconnect plug connection for exhaust system flaps change-over valve.
   Fig 5: Disconnecting Plug Connection For Exhaust System Flaps Change-Over Valve

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   1. 5.1. Unlatch plug connection -a-  and pull it off -B-  .
6. Disconnect wire harness plug connection in engine compartment to the engine wire harness (black, 2-pin).
   Fig 6: Disconnecting Engine Compartment Plug Connection

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   1. 6.1. Unlatch plug connection -a-  and pull it off -B-  .
7. Disconnect plug connections for wire harness in engine compartment to engine wire harness.
   Fig 7: Disconnecting Engine Compartment Engine Wire Harness Plug Connections

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   1. 7.1. Unlatch the plug connections -a-  and pull them off -B-  .
8. Unlatch holder -A-  and remove the plug connections from the holder -B-  .
   Fig 8: Removing Plug Connections From Holder

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9. Guide out tail light connector.
   Fig 9: Guiding Out Tail Light Wire Harness

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   1. 9.1. Remove the rubber sleeve -A-  by squeezing it out of the body aperture.
   2. 9.2. Pull the tail light connector into the engine compartment -B-  .
10. Guide out the sub-part of the wire harness for the rear right wheel housing.
    1. 10.1. Disconnect the electric plug connection at the connection point to the rear right ABS wire harness. → 976519 REMOVING AND INSTALLING THE ABS WIRE HARNESS 
    2. 10.2. Pull the ABS wire harness connector into the engine compartment.
11. Release the wire harness mounting.
    Fig 10: Releasing Wire Harness Mounting

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    1. 11.1. Remove the rubber sleeve by squeezing it -A-  out of the body and pull it a little way into the engine compartment -B-  .
    2. 11.2. Unclip the fixing clip -1- -C-  .
    3. 11.3. Check the fixing clip and replace if necessary.