Remove/Install Pump Unit Of Front Electrohydraulic Suspension - AR32.50-P-0047ME

Model 167 

With Code 489 (AIRMATIC Dual Control/semi-active air suspension) 

With Code 490 (Electrohydraulic suspension) 

Fig 1: Pump Unit Of Front Electrohydraulic Suspension Components Location - Model 167 With Code 489; 490

Courtesy of MERCEDES-BENZ USA

	Risk of injury  to skin or eyes from hydraulic fluid spraying out under pressure.Risk of poisoning  from swallowing hydraulic fluid.	Depressurize hydraulic system completely before starting any work on it. Wear protective clothing and safety glasses.	AS00.00-Z-0013-01A
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
Topical note	Information on E-ACTIVE BODY CONTROL suspension		AH32.50-P-0002-01ME
	Notes on repair work on suspension components		AH00.00-P-0100-01A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Remove/install
1	Empty hydraulic lines of electrohydraulic suspension using guided diagnosis.		AR32.50-P-0042ME
2	Disconnect ground line from on-board electrical system battery.		AR54.10-P-0003ME
3	Remove cover above right front suspension strut tower.
4	Release electrical connector (1) and disconnect.
5	Unhook electrical line (2) from holder and place to one side.
6	Open plug, unscrew nut (3) and remove electric line (4) from grub screw.	Model 167 with engine 256 with code 489 (AIRMATIC Dual Control/semi-active air suspension) with code 490 (Electrohydraulic suspension) Nut, 48 V subharness to refrigerant compressor/electric motor	*BA15.18-P-1003-03MRT
7	Release coolant expansion reservoir.	Model 167 with engine 656 with code 489 (AIRMATIC Dual Control/semi-active air suspension) with code 490 (Electrohydraulic suspension)	AR20.30-P-4949OID
		Model 167 with engine 256.9 with code 489 (AIRMATIC Dual Control/semi-active air suspension) with code 490 (Electrohydraulic suspension)	AR20.30-P-4949MSC
		Model 167 with engine 176, 177 with code 489 (AIRMATIC Dual Control/semi-active air suspension) with code 490 (Electrohydraulic suspension)	AR20.30-P-4949MNO
8	Remove fender liner in right front fender.		AR88.10-P-1301ME
9	Remove bottom engine compartment lining at front and center.		AR61.20-P-1105ME
10	Unclip electric lines (2, 4) from cable ducts and guide out of vehicle.
11	Release and disconnect electrical connector (5).
12	Remove hydraulic lines from front left suspension strut electrohydraulic controller unit (M67) and front right suspension strut electrohydraulic controller unit (M67/1).		AR32.50-P-0044ME
13	Unscrew nuts (6) and remove ground lines (7) from front longitudinal member.	Ground point MPE LF (48V)	*BA00.19-P-1046-01M
14	Unscrew screws (8) and remove front left suspension strut electrohydraulic controller unit (M67) together with front right suspension strut electrohydraulic controller unit (M67/1).
	000 588 11 62 00 Major assembly mount		WS01.00-P-0092B
	000 588 10 62 00 Support plate		WS26.00-P-3309B
		Screw, front hydraulic pump bracket to front axle	*BA32.50-P-1001-04A
15	Install in the reverse order.
	Initial startup
16	Commission electrohydraulic suspension after filling hydraulic lines.
			AD00.00-P-2000-06ME