Remove/Install Electropneumatic Controller Unit - AR32.20-P-0010ME

Model 167 

with code 489 (AIRMATIC Dual Control/semi-active air suspension) 

except code 490 (Electrohydraulic suspension) 

Model 167 

with code 489 (AIRMATIC Dual Control/semi-active air suspension) 

with code 490 (Electrohydraulic suspension) 

Fig 1: Electropneumatic Controller Unit Components Location - Model 167 With Code 489

Courtesy of MERCEDES-BENZ USA

	Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
Notice	Notes on air suspension		AH32.22-P-1000-01T
Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on self-locking nuts and bolts		AH00.00-P-0001-01KOA
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Remove
1	Commission electropneumatic controller unit (7) with AIR BODY CONTROL compressor (A9/1).	If the electropneumatic controller unit (7) is being replaced.
		The electropneumatic controller unit (7) consists of the control unit and AIR BODY CONTROL compressor (A9/1) and can only be replaced as one complete unit.	AD00.00-P-2000-06ME
2	Completely release the pneumatic pressure of the air suspension using the diagnostic system.	Model 167 with code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) Model 167 with code 489 (AIRMATIC Dual Control/semi-active air suspension) with code 490 (Electrohydraulic suspension)	AR32.22-P-0013ME
3	Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).
4	Remove left front wheel and tire assembly.		AR40.10-P-1102ME
5	Remove front section of fender liner in front left fender.		AR88.10-P-1301ME
6	Release electrical connector (1) and disconnect.
7	Unclip retaining clip (2).
8	Release and detach lines (3) at connection fitting.	Do not remove connection fitting from electropneumatic controller unit (7).
9	Unclip lines (3) from holder (4).
10	Mark compressed-air lines (5) using suitable means.
11	Remove compressed-air lines (5) and seal exposed openings with suitable stop plugs.	Box wrench bit	Fig 2
		Record plug	Fig 3
12	Remove nuts (6) and remove electropneumatic controller unit (7) from holder (4) downwards.
	Check
13	Check elastomer bearings of electropneumatic controller unit (7) for damage and wear.	If there is a problem, ↓ replace affected elastomer bearings.
	Install
14	Position electropneumatic controller unit (7) on holder (4) and attach nuts (6).
15	Attach compressed-air lines (5).	Observe markings on compressed-air line; (5).	*BA32.22-P-1003-03B
		Pressure line, air suspension to compressor
		Box wrench bit	Fig 2
16	Connect electrical connector (1) and clip in retaining clip (2).
17	Fill pneumatic pressure system of air suspension externally using the diagnostic system and an adapter.	Model 167 with code 489 (AIRMATIC Dual Control/semi-active air suspension) except code 490 (Electrohydraulic suspension) Model 167 with code 489 (AIRMATIC Dual Control/semi-active air suspension) with code 490 (Electrohydraulic suspension)	AR32.22-P-0013ME
18	Clip lines (3) onto holder (4).
19	Attach lines (3) to connection fitting.
	Check
20	Check connections of compressed-air lines (5) on electropneumatic controller unit (7) for leak tightness.		AR32.22-P-8000ME
21	Install front section of fender liner into front left fender.		AR88.10-P-1301ME
22	Install left front wheel and tire assembly.		AR40.10-P-1102ME

Fig 2: Identifying Box Wrench Bit (000 589 75 03 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Record Plug (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA