Remove/install air bellows · ar3222l2003c · Mercedes-Benz WIS

AR32.22-L-2003C

Remove/install air bellows

15.1.10

MODEL 668.3 with CODE (CE2) Rear air suspension
with electronic level control (ENR),
rear air spring bellows

MODEL 668.3 with CODE (CE3) Front and rear air suspension
with Electronic Level Control (ELC [ENR]),
rear air spring bellows

MODEL 670.3## ## as of 076161 with CODE (CE2) Front and rear air suspension
rear air spring bellows

MODEL 670.3## ## as of 076209 with CODE (CE3) Front and rear air suspension
rear air spring bellows

L32.22-0001-06

1 Air spring bellows

2 Conical plate

3 Piston

4 Protective cap

5 Test connection

6 Air chamber

 	Remove/install
 Danger!	Danger to life from lowering vehicle when working between wheels and body. Risk of injury by pinching or crushing when working on the air suspension.	Do not work between wheel and wheel well or in wheel box. Only carry out check and adjustment operations from underneath the vehicle. Secure areas with moving vehicle parts against unauthorized access.	AS32.22-Z-0001-01A
1	Switch off ignition and remove ignition key	 In order to prevent the vehicle frame being raised or lowered in an uncontrolled manner.
2	Jack up vehicle frame and secure until the wheels are clear of the ground	 Raise vehicle frame approx. 600 mm.
3	Detach protective caps (4) and empty air spring bellows (1) completely by pressing the pressure pin (arrow) on the test connections (5) of the air chambers (6)
4	Use assembly lever to pry air spring bellows (1) off the conical plate (2) and the piston (3)	 When pry offing off, ensure that no scores occur on the seats of the conical plate (2) and piston (3) which can lead to leakage at the air spring bellows (1).
5	Fold the air spring bellows (1) together and remove	 Installation: Coat raised beads of the air spring bellows (1) with soapy water.
6	Clean seat of piston (3), check for damage and coat with soapy water	 If damaged, replace piston (3). 
		Detach piston of air spring bellows on air bellows crossmember	AR32.22-L-2003-02B
			*BA32.22-N-1003-01D
			*BA32.22-N-1006-01D
7	Clean seat of conical plate (2), check for damage and coat with soapy water	 If damaged, replace conical plate (2). 
		Detach/attach conical plate of air spring bellows	AR32.22-L-2003-03B
			*BA32.22-N-1002-01D
8	Install in the reverse order
9	Apply compressed air to air spring bellows (1) via one of the test connections (5) until the air spring bellows (1) contacts the sealing surfaces of the conical plate (2) and the piston (3)	 In order not to damage the air spring bellows (1) apply a maximum of 7 bar to the air spring bellows (1).  Fill air spring bellows (1) until the sealing beads contact the sealing surfaces correctly.
		 Test kit	*360589002100
10	Check air suspension for leaks		AR32.22-L-8000A
11	Calibrate electronic level control (ENR) control unit		AR32.33-L-0004A

 Air bellows

Number	Designation		Model 668.3, 670.3/4 with CODE CE2 (rear air suspension)	Model 668.3, 670.3/4 with CODE CE3 (front and rear air suspension)


BA32.22-N-1002-01D	Nut for attaching conical plate of rear axle air spring bellows to frame	Nm	56	56
BA32.22-N-1003-01D	Nut for attaching piston of rear axle air spring bellows to air bellows crossmember	Nm	100	100
BA32.22-N-1006-01D	Banjo bolt, pressure line of air chamber to rear piston	Nm	60	60

Test kit

360 589 00 21 00

Referenced documents

ar3222l200302b Detach/attach piston of air spring bellows on air bellows crossmember
ar3222l200303b Detach/attach conical plate of air spring bellows
ar3222l8000a Check air suspension for leaks
ar3233l0004a Calibrating electronic level adjustment (ELA) control unit
as3222z000101a Risk of death from lowering vehicle when working between wheels and body. Risk of injury from pinching or crushing when working on the air suspension.