37 11 030 Removing and installing complete front left or right spring strut (adaptive M chassis and suspension)

Installation note: 

1. All screws, nuts, bolts and hose clamps removed during the repair must be replaced.
2. Retaining elements on chassis and suspension and steering parts must be replaced.

Necessary preliminary tasks: 

• Remove FRONT WHEEL .
• Remove ANTI-ROLL BAR LINK FROM SPRING STRUT .
• Disconnect plug connection for pulse sensor and expose cable up to holder on spring strut.
• Disconnect plug connection for brake pad wear sensor and expose cable up to brake caliper.

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

Tightening torque, refer to: 31 60 2AZ .

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Installation note: 

• Replace collar bolt (1) and compression spring (2).
• Pay attention to installation position of compression spring (2).
• Keep collar bolt and spur toothing of bearing/propeller shaft clean and free of grease
• Follow installation note of the spur gearing. 

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Attention! 

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, refer to: 31 60 2AZ .

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Unlock connector (1) in direction of arrow and pull off towards bottom!

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Only on ride-height sensor at left  :

Release link at wishbone.

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Release nut (1), if necessary, counter-hold at inner Torx (T40).

Installation note: 

Keep wishbone to swivel bearing connection clean and free from oil and grease.

Replace self-locking nut.

Tightening torque, refer to: 31 12 4AZ .

Pull wishbone (1) in direction of arrow and feed out of swivel bearing (2).

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Attention! 

Wishbone (1) can lie on swivel bearing (3).

Risk of damage to the rubber grommet (2) by the swivel bearing (3).

• Remove front BOTH FRONT BRAKE DISCS.
• Remove the TRACK ROD END FROM SWIVEL BEARING .
• Remove the TENSION STRUT FROM SWIVEL BEARING

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Unlock closures (1). Press clamps (2) together and lift.

Remove cover (3).

Installation note: 

Make sure closures are correctly locked.

Attention! (Right side): 

Risk of short circuits! Cover positive terminal (3) with suitable material.

Release screw (1) on suspension cross-brace.

Tightening torque, refer to: 51 61 1AZ.

Installation note: 

Replace screw

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Release screws (2) and remove spring strut with swivel bearing towards bottom.

Tightening torque, refer to: 31 31 1AZ.

Installation note: 

Clean inside contact surface at spring strut dome.

Align spring strut with boreholes on spring strut dome using centring pins and push up.

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Installation note: 

Check sealing washer (1) for damage, replace if necessary.