Remove/install air spring

AR32.22-P-1500EW

Remove/install air spring

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

1

Screw

2

Bracket

3

Brake caliper

4

Electrical connector

6

Spring control arm

41

Air spring

41a

Pressure line

Y53

Left rear axle damping valve unit

Y54

Right rear axle damping valve unit

6e

Lock

6f

Cover

7

Ring wrench

 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

 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



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 air spring (41) using diagnostic system



AD00.00-P-2000-04A

 Installation:
Carefully fill air spring (41) according to specifications.
The air spring (41) may 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

Press locks (6e) of cover (6f) together using a suitable sleeve or a box wrench (7) (arrow B) and remove cover (6f) from left or right spring control arm (6)

5

Detach electrical connector (4) from left rear-axle damping valve unit (Y53) or right rear-axle damping valve unit (Y54)

6

Remove screw/bolt (1)

When removing right air spring (41).

 Screw/bolt, brake wear sensor to brake caliper

*BA42.10-P-1003-12J

7

Remove bracket (2) from brake caliper (3)

When removing right air spring (41).

8

Detach pressure line (41a) from air spring (41)

 Installation:
When reinstalling the old air spring (41), make sure that the pressure line (41a) is carefully screwed on to the plastic thread.
Otherwise, the plastic thread will be damaged thereby destroying the air spring (41).

 Seal pressure line (41a) with blind plugs during repair work.

When replacing the air spring (41):



Break open the clamping ring, detach pressure line connection and insert the pressure line (41a) up to the marking in the new pressure line connection. Pull back pressure line (41a) a short distance so that the peripheral retaining edges in the inside of the clamping ring engage in the line outer surface.

If pressure line (41a) is damaged or leaky or if pressure line connection is damaged:



Repair AIRmatic pressure line connection.

AR32.22-P-2001-02SX

 Pressure line to air suspension/valve unit

*BA32.22-P-1010-03E

 Knife

*000589122800

 Socket wrench bit

*211589000900

9

Unscrew nut for damper to spring control arm (6) and pull relevant bolt out of spring control arm (6)

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

*BA32.25-P-1001-03M

10

Press damper together and remove rearwards out of the spring control arm (6)

 Installation: The air spring (41) with the air spring centering (arrow A) must be positioned correctly in the lower spring control arm (6).

11

Pull air spring (41) downwards carefully at its upper plastic frame until the air spring (41) releases from the retaining clip


Do not turn air spring (41).
It will be damaged otherwise.

 Installation:
The air spring (41) must engage completely in the retaining clip.
Otherwise, when filling, the air spring (41) can tilt over in the upper spring cup thereby damaging the plastic frame of the air spring (41).

 Removal: The retaining clip of air spring (41) is destroyed.

 Installation: Replacing retaining clip.



Replacing retaining clip.

AR32.22-P-1500-02EW

12

Remove air spring (41) rearwards over the brake hose

 Removal:
Carefully remove air spring (41).
Otherwise, the outer boot of the air spring (41) may be damaged.

 Installation:
The outer boot on the air spring (41) may not be pressed in during assembly, rectify any deformations.
Otherwise the movement of the spring will damage the spring bellows on the inside.



Check

13

Check air spring (41) for damage

If damage is present:



Replace air spring (41).

14

Install in the reverse order

15

Check AIRmatic or steel/air suspension for leaktightness

MODEL 212
with CODE 488 (Steel/air suspension)
MODEL 212
with CODE 489 (AIRMATIC)

AR32.22-P-8100EW

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

AR32.22-P-8100EL

16

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

17

Perform engine test run and check AIRmatic for proper operation

 Air suspension

Number

Designation

MODEL 212

MODEL 218

BA32.22-P-1010-03E

Pressure line to air suspension/valve unit

Nm

2 (+0,5)

2 (+0,5)

 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 brake caliper

Number

Designation

MODEL 212

MODEL 218

BA42.10-P-1003-12J

Screw/bolt, brake wear sensor to brake caliper

Nm

8

8