Remove/install rear shock absorber

AR32.25-P-0110EWA

Remove/install rear shock absorber

21.11.2014

MODEL

212.0/1, 218

with CODE 488 (Steel/air suspension)

MODEL

212.0/1, 218

with CODE 489 (AIRMATIC)

MODEL

212.2

Shown on right shock absorber (7)

1

Nuts

2

Suspension strut bearing

4

Screw

5

Nut

6

Spring control arm

7

Shock absorber

7a

Elastomer bearing

8

Nut

9

Piston rod

Y53

Left rear axle damping valve unit

Y54

Right rear axle damping valve unit

6e

Lock

6f

Cover

 Danger !

Risk of injury. Moving parts can pinch, crush or, in extreme cases even sever extremities.

No parts of the body or limbs should be within the operating range of the mechanism when moving components.

AS00.00-Z-0009-01A

 Danger !

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.

AS00.00-Z-0010-01A



Notes on self-locking nuts and bolts

AH00.00-N-0001-01A



Notes on AIRmatic

AH32.22-P-1000-02EW



Notes on repair work on suspension components

AH00.00-P-0100-01A

 

Remove/install

1

Empty left and right air spring using diagnostic system



AD00.00-P-2000-04A

 Installation:
Inflate air spring properly.
The air spring can otherwise be damaged and fail later.

2.1

Switch off ignition and remove transmitter key from electronic ignition lock control unit

MODEL 212.0/1, 218
with CODE 488 (Steel/air suspension)
without CODE 889 (KEYLESS-GO)
MODEL 212.0/1, 218
with CODE 489 (AIRMATIC)
without CODE 889 (KEYLESS-GO)
MODEL 212.2
without CODE 889 (KEYLESS-GO)

2.2

Switch off ignition and remove transmitter key or KEYLESS-GO start/stop button from electronic ignition lock control unit

MODEL 212.0/1, 218
with CODE 488 (Steel/air suspension)
with CODE 889 (KEYLESS-GO)
MODEL 212.0/1, 218
with CODE 489 (AIRMATIC)
with CODE 889 (KEYLESS-GO)
MODEL 212.2
with CODE 889 (KEYLESS-GO)

3

Remove left or right rear wheel



AP40.10-P-4050EW

4

Remove left and right rear fender liner

MODEL 212.0/1, 218
with CODE 488 (Steel/air suspension)
MODEL 212.0/1, 218
with CODE 489 (AIRMATIC)
MODEL 212.2

MODEL 218
with CODE 488 (Steel/air suspension)
MODEL 218
with CODE 489 (AIRMATIC)

AR88.10-P-1400ELX

5

Press locks (6e) of cover (6f) together using a suitable sleeve or box wrench (arrow) and detach cover (6f) from spring control arm (6)

6

Unscrew nut (5) and pull bolt (4) out of spring control arm (6)

 Self-locking nut, shock absorber to spring control arm

*BA32.25-P-1001-03M

7

Detach electrical connector from left rear-axle damping valve unit (Y53) or right rear-axle damping valve unit (Y54)

8.1

Remove left or right side cover in the trunk

MODEL 212.0/1, 218.3
with CODE 488 (Steel/air suspension)
MODEL 212.0/1, 218.3
with CODE 489 (AIRMATIC)

MODEL 212.0/1
with CODE 488 (Steel/air suspension)
MODEL 212.0/1
with CODE 489 (AIRMATIC)

AR68.30-P-4600EW

MODEL 218.3
with CODE 488 (Steel/air suspension)
MODEL 218.3
with CODE 489 (AIRMATIC)

AR68.30-P-4600EL

8.2

Remove left or right side trim in load compartment

MODEL 212.2
MODEL 218.9
with CODE 488 (Steel/air suspension)
MODEL 218.9
with CODE 489 (AIRMATIC)

MODEL 212.2

AR68.30-P-1180ES

MODEL 218.9
with CODE 488 (Steel/air suspension)
MODEL 218.9
with CODE 489 (AIRMATIC)

AR68.30-P-1180ELX

9

Unscrew nuts (1)

 Self-locking nut, damper to body

*BA32.25-P-1002-03M

10

Push shock absorber (7) together and remove toward rear

 Installation:
The outer boot on the shock absorber (7) must not be pushed in during assembly; rectify any deformations.
Otherwise the movement of the spring will damage the spring bellows on the inside.

 Installation: Push the shock absorber (7) together, position it in the spring control arm (6) and guide the suspension strut mount (2) into the body opening.



Check

11

Check shock absorber (7) for damage

AR32.25-P-0121CW

If damage is present:



Install a new shock absorber (7).

12

Check suspension strut mount (2) for damage

If damage is present:



Install a new suspension strut mount (2).

13

Check lower elastomer bearing (7a) for damage

If damage is present:



Install a new shock absorber (7).

14

Unscrew nut (8) from piston rod (9)

When replacing the shock absorber (7) or suspension strut mount (2).

 Self-locking nut, damper to piston rod

*BA32.25-P-1003-03M

15

Remove suspension strut mount (2)

When replacing the shock absorber (7) or suspension strut mount (2).

16

Install in the reverse order

17

Read out fault memory using the diagnostic system and delete



AD00.00-P-2000-04A

 Danger !

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

18

Perform engine test run and check AIRmatic or steel/air suspension for proper operation

 Rear axle shock absorber

Number

Designation

MODEL 212

MODEL 218

BA32.25-P-1001-03M

Self-locking nut, shock absorber to spring control arm

Stage 1

Nm

60

60

Stage 2

°

60

60

 Rear axle shock absorber

Number

Designation

MODEL 212

MODEL 218

BA32.25-P-1002-03M

Self-locking nut, damper to body

Stage 1

Nm

15

15

Stage 2

Nm

35

35

 Rear axle shock absorber

Number

Designation

MODEL 212

MODEL 218

BA32.25-P-1003-03M

Self-locking nut, damper to piston rod

Nm

28

28