Rear axle

Back to: WIS 32.00 General

Identification - Rear Drive/Axle Suspension

Components - Rear Drive/Axle Suspension

Lower Bushing - Rear Drive/Axle Suspension

The Lower Rear Axle Suspension Bushing, item (17) and item (10) below, is located at the strut supporting joint in the wheel carrier.

Designations - Rear Axle Suspension

Part	Part no.	Image	Description
17	A2203520027		Supporting joint. Damper strut mounting. Non-OEM part by TRW - JBU167.
25	N910105014017		Hexagon head bolt. Hydropneumatic spring leg to spring control arm M14X1.5X80.
30	N000000003277		Nut. Hydropneumatic spring leg to spring control arm M14X1.5.

Part	Part no.	Image	Description
10	A2203520027		Supporting joint (left and right). Non-OEM part by TRW - JBU167.
42	A2209900604		Bolt. Spring control arm to wheel bearing (left and right) M14X1.5X80.
45	A1403521576		Washer. Spring control arm to wheel bearing (left and right).
50	N000000003281		Hexagon nut. Spring control arm to wheel bearing (left and right) M14X1,5.

Issues - Rear Suspension

• Squeaking, creaking noises from the rear suspension is a common problem.
• The axial ball joints that look like bushings lose their internal lubrication.

There is one at the bottom of each suspension strut and another one at the back of the wheel spider. Four of them in total. There is no part number for the bottom strut ones but they are the same as the outer ones.

It is recommend to replace both the strut one and the outer one when during replacement.

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W220 squeaking noise from rear suspension.

Parts - Rear Suspension

• M-B: A2203520027.
• TRW: JBU167.

Tools - Rear Suspension

• To remove and replace the bushing a special tool is needed.
• Removal and Installation Tool W202589004300 (see Special Tools page).

DIY Tasks - Rear Suspension

Lower Bushes - Temporary Fix

A quick temporary fix is to make a slit in the rubber seal and inject some oil.

Lower Bushes - Rear Suspension DIY Replacement

Reference: WIS AR32.25-P-1871M Replace rubber mounts of rear shock absorbers

Designations -Rear Shock Absorbers

Removal -Rear Shock Absorbers Rubber Bushes

1. Empty suspension strut (4) of rear axle using STAR DIAGNOSIS.
2. Partially remove spring control arm (1). TIP: Unhook exhaust system on both rear exhaust-rubber mounts. TIP: Detach spring control arm from rear axle carrier and swing downwards.
3. Remove rubber mounts (2) using extraction and insertion tool (01). AIRmatic Lower Rubber Bushes - Rear Suspension

   

4. Clean and check bearing seat (3).

Installation -Rear Shock Absorbers Rubber Bushes

1. Install rubber mounts (2) using extraction and insertion tool (01). TIP: Do not squeeze plastic parts (large arrow) of the rubber mount (2). Cracked plastic parts result in corrosion and thus to damage to the rubber mount(2).
2. Check installation position of the rubber mount (2). TIP: Carry out visual inspection of distances (small arrows) from outer bearing shell collar (2b) to the bearing seat edge (3k). In the event of unequal distances (small arrows) correct the installation position using the extraction and insertion tool (01).
3. Install spring control arm (1). TIP:Unhook exhaust system on both rear exhaust-rubber mounts.
4. Fill the suspension strut (4) using STAR DIAGNOSIS. TIP: The wheels must not touch the ground while pressurizing because the air spring bellows in the suspension strut (4) will be destroyed if pressurized with the suspension compressed.
5. Check AIRmatic for leaks.

Resources - Rear Suspension

http://www.benzworld.org/forums/w210-e-class/1602887-diy-r-r-outer-bushing-rear.html

http://www.peachparts.com/shopforum/diesel-discussion/338574-notes-r-r-outer-lca-bushings-w124-others.html

http://www.benzworld.org/forums/w201-190-class/1673624-worn-out-hub-carrier-bushing-3.html

http://www.benzworld.org/forums/w220-s-class/1623753-loud-creaking-rear-03-w220-4matic.html

http://www.benzworld.org/forums/w220-s-class/1695182-w220-04-s600-abc-issue-squeaking.html

How to change subframe bushes: http://forums.mercedesclub.org.uk/showthread.php?t=90826 and http://forums.mercedesclub.org.uk/showthread.php?t=90827 .