37 11 030 Removing and installing front left or right spring strut (all-wheel drive vehicle)

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Necessary preliminary work

Remove FRONT WHEEL .

Release collar bolt (1), press brake pedal to floor for this purpose.

Tightening torque 31 60 2AZ .

Fig 1: Identifying Collar Bolt

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Installation note:

Renew collar bolt (1) and compression spring (2).
Pay attention to direction of installation of compression spring!
Keep collar bolt and spur gearing of bearing/output shaft clean and free of grease.
Follow installation note of the spur gearing.

Fig 2: Identifying Compression Spring And Collar Bolt
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Remove top wishbone . See 31 12 002 REMOVING AND INSTALLING/REPLACING TOP LEFT WISHBONE or 31 12 003 REMOVING AND INSTALLING/REPLACING TOP RIGHT WISHBONE .
RELEASE ANTI-ROLL BAR LINK AT SPRING STRUT .
REMOVE BRAKE DISC and tie up brake caliper.
Unlock and disconnect cable from pulse sensor and set it back.

Fig 3: Identifying Feed Line And Plug Connection
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Unlock plug connection (1) and disconnect.

Disconnect feed line (2) from mounting.

Release nut (1) and remove screw.

Tightening torque 31 12 7AZ .

Release spring strut from wishbone (2).

Installation note:

Note direction of insertion of screw.

Replace screw and nut.

Tighten in NORMAL POSITION .

Fig 4: Releasing Spring Strut From Wishbone

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Risk of damage

Secure output shaft against falling out. Tripods must not fall into the gaiter

IMPORTANT: Risk of damage!
Secure spring strut against falling out.

Release screws (1).

Tightening torque 31 31 1AZ .

Fig 5: Identifying Spring Strut Screws

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Installation note:

Replace screws.
Clean contact surface at spring strut dome.
Turn mount in clockwise direction and tighten down!

Tightening torque 31 31 1AZ .

Fig 6: Turning Support Bearing
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With helper, press swivel bearing (1) down until spring strut (2) can be led along wheel arch lower edge. Afterwards, remove complete spring strut (2) upwards.

Fig 7: Pressing Swivel Bearing

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IMPORTANT: Note on installation must be observed without fail!

Installation note:

Spur gearing of bearing (1) and output shaft (2) must be installed form-fit (tooth in tooth)!
Tighten collar bolt and compression spring by hand.
Check whether spur gearing is locked tooth in tooth by reciprocally rotating wheel hub/output shaft.
Once a form-fit has been ensured, tighten to final torque.
Tightening torque 31 60 2AZ .

Fig 8: Installing Bearing Spur Gear
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