Remove/install front spring

AR32.20-P-0200MCC

Remove/install front spring

14.2.11

25.1.11

Zinc washer installation in spring cup added

 

Remove/install

 Danger!

Risk of injury caused by pinching or crushing when working on springs or spring bodies that are under tension

Use only approved tensioning devices; shield off hazard area if necessary.
Check special tools for damage and proper operation (visual inspection).
Wear protective gloves.

AS00.00-Z-0001-01A



Notes on self-locking nuts and bolts

AH00.00-N-0001-01A



Daimler AG has not specifically called for the springs (1) to be changed in pairs, but it is advisable

1

Remove left or right front suspension strut

AR32.25-P-1017MCC

2

Clamp assembly tool set (2) in vise

  Pay attention to firm seating of assembly tool set (2) in vise.

 Assembly tool set

*450589089900

3

Insert suspension strut with spring (1) into the assembly tool set (2) and slightly pretighten

 The windings of the spring (1) must be gripped reliably in order to prevent the  assembly tool set (2) from slipping off.

4

Tension spring (1)

 Do not use an impact wrench when clamping.

Clamp spring (1) far enough until the spring cup (3) is exposed

 Installation: Check spring (1) is correctly seated on end stop (8).

5

Unscrew nut (4)

 Do not rotate the piston rod, as otherwise the shock absorber (7) may be damaged.

 Counterhold the piston rod of the shock absorber (7) using a Torx bit (size T45) and a shank length of 100 mm.

If the nut (4) is jammed, push back the boot and  fasten holding device (9) to piston rod of shock absorber (7) and counterhold using  open end wrench (10).

 Open end wrench

*450589010100

 Holding device

*451589006300



*BA32.25-P-1001-04D

6

Remove rubber mount (5) with thrust bearing (6)

 Installation: Check that the thrust bearing (6) is in good condition and is not worn; replace if necessary.

7

Remove spring cup (3) and pull shock absorber (7) out of spring (1)

 Installation: Use new spring cup (3) with zinc shim (11).

8.1

Remove zinc shim (12)

For vehicles with zinc shim (12).

 If necessary, expand the zinc shim (12) on the shock absorber (7) from below.

 Installation: Insert new zinc shim (12). Check end stop (8) is correctly positioned. The zinc shim (12) must be flush-fitted to the lower spring seat.

8.2

Clean lower spring seat of shock absorber (7) using wire brush

For vehicles without zinc shim (12).

 Installation: Insert new zinc shim (12). Check end stop (8) is correctly positioned. The zinc shim (12) must be flush-fitted to the lower spring seat.

9

Release spring (1)

 Springs (1), that were installed without any zinc shims (11, 12), have to be replaced with a new spring (1) with larger diameter, because otherwise the suspension strut may be damaged.

 Do not use an impact wrench.

 Installation: Do not scratch spring (1), paint damage should be repaired.

Preservation agent

*BR00.45-Z-1003-05A

10

Install in the reverse order

Number

Designation

Model 451.3/4

BA32.25-P-1001-04D

Self-locking nut, spring plate to piston rod

Nm

60

Number

Designation

Order number

BR00.45-Z-1003-05A

Cavity sealant, solvent-free (1 l container)

A 000 986 72 70 05