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Home >> Mercedes Benz >> 2011 >> SL550 >> Repair and Diagnosis >> Suspension >> Rear Suspension >> Suspension - 230 Chassis >> Testing & Repair >> Remove/install front axle valve unit - AR32.50-P-0001 >> Remove/install front axle valve body - AR32.50-P-0001RX (SL550, SL55AMG 2007-2008, SL63 AMG, SL600 2007-2009, SL65 2006-2011)

Remove/install front axle valve body - AR32.50-P-0001RX (SL550, SL55AMG 2007-2008, SL63 AMG, SL600 2007-2009, SL65 2006-2011)

MODEL 230.470 /471 /472 /477 

MODEL 230.479 as of model year 2006 

Fig 1: Removing/Installing Front Axle Valve Body
G00544321Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install    
DANGER 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
DANGER Risk of injury to skin or eyes caused by hydraulic fluid spraying out under high pressure. Risk of poisoning caused by swallowing hydraulic fluid Depressurize the hydraulic system completely before starting any work on the system. Wear protective clothing and safety glasses. AS00.00-Z-0013-01A
NOTES Notes on fitting hydraulic lines and hoses   AH32.50-P-0001-02A 
NOTES Before opening the hydraulic system, thoroughly clean the area surrounding the separation point. Even the smallest dirt particles, introduced into the hydraulic components, can lead to malfunctions and a total failure of the hydraulic system    
IMPORTANT Notes on Active Body Control suspension   AH32.50-P-0001-01N 
1 Remove front sections of the lower engine compartment paneling   AR61.20-P-1105R
2 Relieve pressure in front axle ABC system   AR32.50-P-0001-01N 
    TORQUE SPECIFICATION *BA32.50-P-1001-02B 
3 Remove fender liner in the front left fender    
4 Detach bracket (5)    
    TORQUE SPECIFICATION *BA32.50-P-1023-01A 
    TORQUE SPECIFICATION *BA32.50-P-1024-01A 
5 Remove bolts (2) and remove hydraulic lines (3) Ensure that no dirt gets into the opened hydraulic lines (3) as this can lead to the failure of the ABC system.
Installation:  Check sealing rings for damage and replace if necessary. Check support rings for damage and replace the complete hydraulic line (3) if necessary.
 
    TORQUE SPECIFICATION *BA32.50-P-1021-01A 
6 Seal hydraulic lines (3) and openings in the front axle ABC valve unit (Y36/1) with stop plugs SPECIAL TOOL Fig 2
7 Unscrew nuts (1) and remove front axle ABC valve unit (Y36/1) downwards Only remove the front axle ABC valve unit (Y36/1) far enough until the electrical connectors (4) are accessible.  
    TORQUE SPECIFICATION *BA32.50-P-1023-01A 
8 Detach electrical connectors (4) and remove front axle ABC valve unit (Y36/1) Before detaching the electrical connectors (4), check whether the color coding on the front axle ABC valve unit (Y36/1) and the electrical connectors (4) are present. Otherwise, if incorrectly mounted, the front axle ABC valve unit (Y36/1) may be destroyed or malfunction.
Warning: Risk of accident! 
Installation:  The electrical plugs and connections on the front axle ABC valve unit (Y36/1) are color coded relative to each other, and they must not be mixed up.
 
9 Install in the reverse order    
10 Replace stop plugs in removed front axle ABC valve unit (Y36/1) with closure caps When replacing front axle ABC valve unit (Y36/1)
Caps are supplied with new part.
 
11 Fill and bleed ABC system   AR32.50-P-0021N 
12 Carry out plunger travel calibration using STAR DIAGNOSIS When replacing front axle ABC valve unit (Y36/1)  
ACTIVE BODY CONTROL, LINES

Number Designation Model 230
BA32.50-P-1001-02B Bleed screw on soldered fitting in hydraulic line M10x1 Nm 20
ACTIVE BODY CONTROL SUSPENSION

Number Designation Model 230
BA32.50-P-1021-01A Bolt connecting line to front axle valve unit M8x25 Nm 20
BA32.50-P-1023-01A Nut of front axle valve unit to bracket Nm 10
BA32.50-P-1024-01A Nut, valve unit bracket to front end Nm 10
Fig 2: Identifying Set Of Stop Plugs (129 589 00 91 00)
G07743034Courtesy of MERCEDES-BENZ USA