31 31 032 Replacing Front Left or Right Coil Spring

31 31 032 Replacing front left or right spring strut shock absorber

Special tools required:
^ 31 0 001
^ 31 0 003
^ 31 3 340
^ 31 3 341
^ 31 3 351
^ 33 0 040

Warning!
Prior to each use of special tool 31 3 340, it is essential to read the associated Owner's Handbook fully!
All the safety precautions and instructions contained in the Owner's Handbook must be strictly observed!
Failure to observe these safety precautions and instructions increases the risk of serious physical injury, damage to your health and damage to property and equipment!

Important!

1. Prior to each use, check the special tools for defects, modifications and operational reliability.
2. Damaged/modified special tools must not be used!
3. No changes or modifications may be made to the special tools!
4. These special tools are intended solely for the purpose of tightening and relieving cylindrical and tapered suspension springs.
5. Keep special tools dry, clean and (down to the spindle) free from grease.
6. Impact screwdrivers are prohibited!
7. Do not compress coil spring to full extent.

Necessary preliminary tasks:
^ Remove front spring strut

Removing:

Clamp special tool 31 3 341 in vice.

Fit special tools 31 3 351 from above onto special tool 31 3 341 until locking pins (1) perceptibly and audibly snap into place.

Align right spring strut with spring tensioner:
- EDC control unit (1) should be facing diagonally upwards.
- Spring strut fork (2) must be horizontal.

Align left spring strut with spring tensioner:
- Twist spring strut until spring tensioner is in contact with spring retainer (1) in strut mounting.
- EDC control unit (2) should be facing horizontally sidewards.

Warning!
Coils of coil spring must be located completely in recesses of special tools 31 3 351!

Compress coil spring until stress on piston rod is relieved.

Release nut with special tool 33 0 040.

Check spring strut mounting and spring retainer for damage and replace if necessary.

Remove shock absorber, auxiliary damper, protective tube and spring retainer from tensioned coil spring, examine and replace if necessary.

Assembly:
Slide auxiliary damper, protective tube and spring retainer onto shock absorber shaft.

Insert shock absorber in tensioned coil spring.

Important!
Lower end of coil spring must rest against spring retainer stop (1).

Important!
Fit spring strut mounting and align with end of coil spring.

Use special tool 33 0 040 to attach spring strut mounting.

Replace nut!

Tightening torque 31 31 2AZ.

Warning!
Risk of injury!
Adjusting device emits laser beam!
Do not look into the beam!
Laser class 2
To EN60825-1 : 1994
P≤ 1 mW

Align right spring strut with strut mounting!

Position special tool 31 0 001 on spring strut mounting.

"RIGHT" mark (1) must point to arrow (2) on strut mounting.

Fit special tool 31 0 003 to right-hand spring strut.

Make sure attached position is correct.
- EDC control unit (1) should be facing diagonally upwards.
- Spring strut fork (2) must be horizontal.

Align spring strut with strut mounting using laser beam and release spring tension.

Important!
It is imperative that laser beam is pointing to mark (1) on special tool 31 0 001 after spring tension is released.
Failure to observe this requirement will result in substantial impairment of handling characteristics.

Align left spring strut with strut mounting!

Position special tool 31 0 001 on spring strut mounting.

"LEFT" mark (1) must point to arrow (2) on strut mounting.

Fit special tool 31 0 003 to left-hand spring strut.

Make sure attached position is correct.
- EDC control unit (1) should be facing horizontally sidewards.
- Spring strut fork (2) must be angled.