Remove/install air spring - AR32.22-P-1500RT

MODEL 251 with CODE (488) Steel/air suspension with CODE (489) Airmatic (air suspension with level adjustment and adaptive damping system ADS) 

Fig 1: Identifying Air Spring Remove/Install Components (1 Of 4)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Air Spring Remove/Install Components (2 Of 4)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Air Spring Remove/Install Components (3 Of 4)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Air Spring Remove/Install Components (4 Of 4)

Courtesy of MERCEDES-BENZ USA

	Removing
	Risk of injury  caused by moving parts that 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
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
	Notes on self-locking nuts and bolts	All models	AH00.00-N-0001-01A
	Notes on AIRmatic		AH32.22-P-1000-02RT
1	Raise vehicle with vehicle lift	Raise vehicle far enough until the wheels are clear of the ground.	AR00.60-P-1000RT
2	Empty air spring (3) with STAR DIAGNOSIS diagnosis system
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
3	Switch off ignition and remove the transmitter key from the EIS [EZS] control unit	On vehicles with Keyless Go, code 889: Press Keyless Go start/stop button repeatedly until ignition is switched off. Remove transmitter key from vehicle and store it in a location beyond its transmission range (at least 2 m).
4	Raise vehicle with vehicle lift		AR00.60-P-1000RT
5	Unscrew threaded connection for compressed air line of air suspension (5) from the air spring (3)	Seal opening at the threaded connection for compressed air line of air suspension (5) and at the air spring (3).
		Socket	Fig 5
6	Carefully pull the air spring (3) downwards at its top plastic frame (arrows B), until the air spring (3) detaches from the retaining clip (1)	Do not twist air spring (3) otherwise it will be damaged The retaining clip (1) must be replaced during installation as it is destroyed during removal.
7	Carefully push the air spring (3) together upwards (arrow C), in the process press the air spring centering (4) from below out of the lower transverse control arm (6)	Do not twist air spring (3) otherwise it will be damaged
8	Remove air spring (3) downwards at an angle (arrow D)
	Checking
9	Check air spring (3) and cover (2) for damage	Replace if necessary. If necessary remove the remains of the retaining clip (1) from the upper bore of the air spring (3).
	Install
	If the air spring (3) is not installed and filled in accordance with the regulations, it can be pre-damaged and fail later on
10	Mount cover (2) on the air spring (3)	The fixing journals (7) must engage in the holes (arrows E) of the air spring (3). The curvature (arrow F) of the cover (2) must be positioned above threaded connection of the compressed air line of the air suspension (5).
11	Install new retaining clip (1) on the body	Remove the remains of the old retaining clip (1) from the body
12	Insert air spring (3)	Do not twist air spring (3) otherwise it will be damaged The air spring (3) must latch in the retaining clip (1) and be positioned with the lug (arrow A) of the air spring centering (4) correctly in the lower transverse control arm (6).
13	Screw threaded connection for compressed air line of air suspension (5) onto the air spring (3)		*BA32.22-P-1009-03C
		Socket	Fig 5
14	Lower vehicle with lifting platform	Only lower vehicle far enough that the wheels are still easily accessible.	AR00.60-P-1000RT
15	Start engine and run	Before starting ensure that the transmission is in the park position Use exhaust extraction!
16	Fill the air spring (3) using the STAR DIAGNOSIS diagnosis system	Ensure leaktightness of air suspension system.
17	Switch off engine and lower vehicle using the lifting platform

Fig 5: Identifying Wrench Socket (211 589 00 09 00)

Courtesy of MERCEDES-BENZ USA