Remove/install front shock absorber

AR32.25-P-0105MCC

Remove/install front shock absorber

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 (4) into the assembly tool set (2) and slightly pretighten

 The windings of the spring (4) must be gripped reliably in order to prevent the  assembly tool set (2) from slipping off.

4

Tension spring (4)

 Springs (4), that were installed without any zinc shims (12, 13), have to be replaced with a new spring (4) with larger diameter, because otherwise the suspension strut may be damaged.

 Do not use an impact wrench when clamping.

Clamp spring (4) far enough until the spring cup (5) is exposed

 Installation: Pay attention to the correct seat of the spring (4) on the end stop (9) of the damper (1).

Paint damage on the spring (4) should be rectified.

Preservation agent

*BR00.45-Z-1003-05A

5

Unscrew nut (7)

 Do not rotate the piston rod, as otherwise the shock absorber (1) may be damaged.

 Counterhold the piston rod of the shock absorber (1) using a Torx bit (size T45) and a shank length of 100 mm.

If the nut (7) is jammed, push back the boot (3) and  fasten the holding device (10) to the piston rod of the shock absorber (1) then counterhold with  open end wrench (11).

 Open end wrench

*450589010100

 Holding device

*451589006300



*BA32.25-P-1001-04D

6

Remove rubber mount (6) with thrust bearing (8)

 Installation: Check that the thrust bearing (8) is in good condition and is not worn; replace if necessary.

7

Remove spring cup (5) and pull shock absorber (1) out of spring (4)

 Installation: Use new spring cup (5) with zinc shim (12).

8.1

Remove zinc shim (13)

For vehicles with zinc shim (13).

 If necessary, expand the zinc shim (13) on the shock absorber (1) from below.

 Installation: Use new zinc shim (13). Check end stop (9) is correctly positioned. The zinc shim (13) must be flush-fitted to the lower spring seat.

8.2

Clean lower spring seat of shock absorber (1) using wire brush

For vehicles without zinc shim (13).

 Installation: Use new zinc shim (13). Check end stop (9) is correctly positioned. The zinc shim (13) must be flush-fitted to the lower spring seat.

9

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