Remove/install air suspension bellows

AR32.22-P-2003EQ

Remove/install air suspension bellows

02.04.2019

Model

293

Shown on right air suspension bellows (1)

1

Air suspension bellows

3

Shock absorber

2

Spring control arm

4

Pressure line

 Warning

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 area of mechanical components when moving components.

AS00.00-Z-0009-01A

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Notes on safety-relevant components

AH00.00-Z-0019-01A

Notes on repair work on suspension components

AH00.00-P-0100-01A

Notes on level control

AH32.22-P-1001-02LWT



Remove

1

Remove corresponding rear wheel.

AR40.10-P-1102A

2

Release pressure from air suspension bellows (1) using vehicle diagnosis system.



AD00.00-P-2000-06FR

3

Switch off ignition and store transmitter key outside of transmission range (min. 2  m).

4

Remove pressure line (4) from air suspension bellows (1) and seal openings using suitable stop plugs.

 Box wrench bit

*001589000300

 Record plug

*129589009100

5

Remove trim at spring link (2).

6

Remove shock absorber (3) at spring link (2) and push outward in lower area.

7

Carefully pull air suspension bellows (1) downward on upper plastic frame until air suspension bellows (1) release from retaining clip.


Do not completely compress or extend air suspension bellows (1).
Otherwise, the air suspension bellows (1) will be damaged.

 The retaining clip is destroyed when the air suspension bellows (1) are removed.

8

Remove air suspension bellows (1) towards rear.


Carefully remove air suspension bellows (1).
Otherwise, the protective boot of the air suspension bellows (1) may be damaged.

9

Remove retaining clip.

AR32.22-P-1500-02EW



Check

10

Check condition of air suspension bellows (1).


There must not be any intrusions on the protective boot.
Otherwise the movement of the spring will damage the spring bellows on the inside.

In the event of a problem,



replace air suspension bellows (1).



Install

11

Install new retaining clip.

AR32.22-P-1500-02EW

12

Position air suspension bellows (1) with air suspension centering (arrow) on spring link (2).


Do not completely compress or extend air suspension bellows (1).
Otherwise, the air suspension bellows (1) will be damaged.

13

Position air suspension bellows (1) on retaining clip and latch into place.


Do not completely compress or extend air suspension bellows (1).
Otherwise, the air suspension bellows (1) will be damaged.

14

Attach shock absorber (3) to spring link (2).

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

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

*BA32.25-P-1001-03P

15

Attach trim to spring link (2).

16

Remove all stop plugs.

17

Attach pressure line (4) to air suspension bellows (1).


The thread on the connection of the pressure line (4) must not be damaged.
Otherwise, leaks will occur.

 Pressure line to rear air suspension/valve unit

*BA32.22-P-1005-03G

 Box wrench bit

*001589000300

If thread is damaged,



repair connection of pressure line (4).

AR32.22-P-2001-01EQ

 Box wrench bit

*001589000300

 Knife

*000589122800

18

Build up pressure in air suspension bellows (1) using vehicle diagnosis system.



AD00.00-P-2000-06FR


Build up air suspension pressure as per the specifications.
Otherwise, parts of the air suspension will suffer initial damage and malfunction at a later stage.

19

Attach rear wheel.

AR40.10-P-1102A



Check

 Warning

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

20

Start engine and check air suspension for proper operation.

21

Check air suspension bellows (1) for leak tightness.

AR32.33-P-0021EQ

 Air suspension

Number

Designation

Model 293

BA32.22-P-1005-03G

Pressure line to rear air suspension/valve unit

Nm

2

 Rear axle shock absorber

Number

Designation

Model 293

BA32.25-P-1001-03P

Self-locking nut, shock absorber to spring control arm

Air suspension

Stage 1

Nm

100

Stage 2

°

90

Steel suspension

Stage 1

Nm

-

Stage 2

°

-