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Home >> Mercedes Benz >> 2025 >> S580 >> Repair and Diagnosis >> Suspension >> Suspension Control Systems >> Suspension -- 223 Chassis >> Testing & Repair >> Remove/Install Delivery Pump Of Front Electrohydraulic Suspension - AR32.50-P-0045S

Remove/Install Delivery Pump Of Front Electrohydraulic Suspension - AR32.50-P-0045S

Model 223 

with code 490 (Electrohydraulic suspension) 

MODIFICATION NOTES

07.12.2021 Bolt, hydraulic line to hydraulic pump   BA32.50-P-1005-04B
Fig 1: Delivery Pump Of Front Electrohydraulic Suspension Components Location - Model 223 With Code 490
G16190987Courtesy of MERCEDES-BENZ USA
WARNING 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
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
REMOVINGINSTALLING Remove/install     
1 Empty hydraulic lines (1) 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 corresponding front wheel.   AR40.10-P-1102A
4 Remove rear fender liner at the front. Model 223.0/1
with code 490 (Electrohydraulic suspension)
AR88.10-P-1301S
5 Release underbody paneling at side in area of holder (2).   AR61.30-P-1001S
6 Disconnect electrical connector (4) and unclip    
  electric line (3).    
7 Disconnect electrical connector (5).    
8 Turn steering knuckle to right or left.    
9 Remove ground line (6) from body. TORQUE SPECIFICATION Ground point, Hydraulic pump front right *BA00.19-P-1055-01N 
    TORQUE SPECIFICATION Ground point, Hydraulic pump front left *BA00.19-P-1054-01N 
10 Clean area of pressure line connections. IMPORTANT Do not use any cleaning agents or solvents.  
11 Remove bolts_(7). TORQUE SPECIFICATION Bolt, hydraulic line to hydraulic pump *BA32.50-P-1005-04B 
    SPECIAL TOOL Socket wrench bit Fig 2
12 Remove hydraulic lines (1) of electrohydraulic suspension and seal exposed connections with suitable stop plugs. IMPORTANT Collect escaping hydraulic fluid using suitable container.
INSTALLATION IMPORTANT : Replace damaged sealing rings.
SPECIAL TOOL Record plug
Fig 3
13 Remove nut from screw (8). TORQUE SPECIFICATION Nut, holder for front hydraulic pump to holder *BA32.50-P-1004-04B 
14 Remove screws (9). TORQUE SPECIFICATION Screw, holder for front hydraulic pump to longitudinal member *BA32.50-P-1003-04B 
15 Remove front electrohydraulic controller unit (M67, M67/1).    
16 Install in the reverse order.    
17 Commission electrohydraulic suspension after filling hydraulic lines (1).    
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-06FR
GROUND POINTS

Number Designation Model 223 except code Z07 (B7 armoring on special protection version) Model 223 with code Z07 (B7 armoring on special protection version)
BA00.19-P-1054-01N Ground point, Hydraulic pump front left W84/3 Nm 16 16
GROUND POINTS

Number Designation Model 223 except code Z07 (B7 armoring on special protection version) Model 223 with code Z07 (B7 armoring on special protection version)
BA00.19-P-1055-01N Ground point, Hydraulic pump front right W84/4 Nm 16 16
ELECTROHYDRAULIC SUSPENSION

Number Designation Model 223 with code 490 (Electrohydraulic suspension)
BA32.50-P-1003-04B Screw, holder for front hydraulic pump to longitudinal member Nm 20
ELECTROHYDRAULIC SUSPENSION

Number Designation Model 223 with code 490 (Electrohydraulic suspension)
BA32.50-P-1004-04B Nut, holder for front hydraulic pump to holder Nm 50
ELECTROHYDRAULIC SUSPENSION

Number Designation Model 223 with code 490 (Electrohydraulic suspension)
BA32.50-P-1005-04B Bolt, hydraulic line to hydraulic pump Stage 1 Nm 18
Stage 2 ∠° 45
Fig 2: Identifying Socket Wrench Bit (167 589 01 09 00)
G14790674Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Record Plug (129 589 00 91 00)
G09975019Courtesy of MERCEDES-BENZ USA