Remove/Install Delivery Pump Of Rear Electrohydraulic Suspension - AR32.50-P-0046S

Model 223 

with code 490 (Electrohydraulic suspension) 

Shown with twin-pipe exhaust system 

Courtesy of MERCEDES-BENZ USA

Fig 1: Delivery Pump Of Rear Electrohydraulic Suspension Components Location - Model 223 With Code 490

Courtesy of MERCEDES-BENZ USA

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
	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 threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
Notice	Information on E-ACTIVE BODY CONTROL suspension		AH32.50-P-0002-01ME
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Notes on repair work on suspension components		AH00.00-P-0100-01A
	Remove/install
1	Empty hydraulic lines (3) of electrohydraulic suspension using guided diagnosis.		AR32.50-P-0042S
2	Disconnect ground line from on-board electrical system battery.		AR54.10-P-0051S
3	Remove rear underfloor paneling.		AR61.30-P-1001S
4	Release heat shield (1) in area of rear electrohydraulic controller unit (M67/2, M67/3).
5	Clean area of pressure line connections.	Do not use any cleaning agents or solvents.
6	Remove screws (2).	Bolt, hydraulic line to hydraulic pump	*BA32.50-P-1005-04B
		Socket wrench bit	Fig 2
7	Remove hydraulic lines (3) of electrohydraulic suspension and seal exposed connections with suitable stop plugs.	Collect escaping hydraulic fluid using suitable container. : Replace damaged sealing rings. Record plug	Fig 3
8	Remove trim for spare wheel well.		AR68.30-P-4620S
9	Remove ground lines (4).	Ground point, Hydraulic pump rear right	*BA00.19-P-1057-01N
		Ground point, Hydraulic pump rear left	*BA00.19-P-1056-01N
10	Disconnect electrical connectors (5).
11	Remove grommets (6) from spare wheel well.
12	Pull out electrical wiring harnesses (7).
13	Disconnect electrical connectors (8) and unclip electrical wiring harnesses.
14	Remove nuts (9).	Nut, holder for rear hydraulic pump to holder	*BA32.50-P-1002-04B
15	Remove screws (10).	Screw, holder for rear hydraulic pump to load compartment well	*BA32.50-P-1001-04B
16	Remove rear electrohydraulic controller unit (M67/2, M67/3).	Helper required.
17	Remove corresponding rear electrohydraulic controller unit (M67/2, M67/3).	Only when replacing one of the rear electrohydraulic controller units (M67/2, M67/3). Screw, protective sleeve to rear hydraulic pump	*BA32.50-P-1012-04B
18	Install in the reverse order.
19	Commission electrohydraulic suspension after filling hydraulic lines (3).
			AD00.00-P-2000-06FR

Fig 2: Identifying Socket Wrench Bit (167 589 01 09 00)

Courtesy of MERCEDES-BENZ USA

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

Courtesy of MERCEDES-BENZ USA