31 12 000 Removing and installing left or right wishbone

Fig 1: Wishbone And Screws

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Special tools required: 

• 31 2 230

Necessary preliminary work: 

• Remove FRONT WHEEL .
• Remove FRONT UNDERBODY PROTECTION .

Removal: 

Fig 2: Wishbone Holder Screw

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Only for right ride height sensor:

Release screw (1).

Remove holder from wishbone.

Fig 3: Wheel Arch Panel And Screws

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Release screws (2) from wheel arch panel (1).

Bend wheel arch panel (1) to one side.

Release screws (2) and (3).

Fig 4: Bend Wheel Arch Panel And Screws

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Attention  !

Pay attention to installation position of screws (3)! Different lengths.

Fig 5: Wishbone And Screws

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Release screw (4).

Slacken nut (2).

Pull screw (3) out of swivel bearing.

Release wishbone (1) from swivel bearing.

• If necessary, spread swivel bearing with special tool 31 2 230 .

Remove wishbone (1).

Installation: 

Position wishbone (1).

Align wishbone (1) thrust bearing to front axle support.

Part:  Replace screw (4).

Fig 6: Wishbone And Screws

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Screw in screw (4).

• Do not yet tighten screw (4)!

Fig 7: Bend Wheel Arch Panel And Screws

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Tighten down screws (3).

Tightening torque 31 12 3AZ .

Bend wheel arch panel (1) to one side.

Part:  Replace screws (2).

Tighten down screws (2).

Tightening torque 31 12 4AZ .

Insert guide pin of wheel guide joint into swivel bearing.

Part:  Replace screw (3).

Insert screw (3) with washer in the swivel bearing.

Attention  !

The washer must lie between the screw head and the swivel bearing.

Fig 8: Wishbone And Screws

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Consider the insertion direction of the screw (3). The screw (3) is inserted from the rear in the direction of travel.

Part: Replace nut (2).

Screw on the nut (2).

Tighten screw connection.

• Tightening is done via screw (3).

Tightening torque 31 12 1AZ .

Move vehicle into NORMAL POSITION .

Tighten the bolt (4) in normal position.

Tightening torque 31 12 2AZ .

Tighten screws (2) of wheel arch panel (1).

Fig 9: Wheel Arch Panel And Screws

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Fig 10: Wishbone Holder Screw

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Only for right ride height sensor:

Align the holder using the lug with the corresponding opening on the wishbone.

Tighten screw (1).

Tightening torque 37 14 5AZ .

Required follow-up work: 

• Mount FRONT UNDERBODY PROTECTION .
• Mount FRONT WHEEL .
• Carry out wheel alignment check. See ALIGNMENT CHECK WITH VEHICLE LOAD UP TO DESIGN POSITION or ALIGNMENT CHECK WITH RIDE HEIGHT MEASUREMENT (WITHOUT VEHICLE LOAD) .