SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: Front Valve Block Servo Wiring

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Old 06-06-2022, 10:39 PM
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Front Valve Block Servo Wiring

I'm having issues with a rebuilt front valve block. After getting block back in and starting the car I'm having peculiar issues. The front wheels raise up to full height and a SDS C4 tool won't change it at all in the values window. Even when doing a Rodeo test the fronts do not drop at all like the rears
Just to rule out Car electrical tab connectors being crossed (L - R) can someone please give me a color code diagram/ schematic or even photo of the correct left & right for the servos on the front block?
Any help would would really appreciated
Have a great day
Thanks
Old 06-06-2022, 10:56 PM
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2005 SL 500 R230
I'm hoping you marked the four electrical connectors with their four different colour codes. Tell me you did..

If so then here's which connector goes to which solenoid.


Old 06-06-2022, 11:44 PM
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Thanks for the reply.
Not completely. I took photos that only partially turned out legible.
Y1 Green black
Y3 Orange brown
Servos





[img]file:///Volumes/R230%20Tech/contents/images/abcsuspension/p41design.gif[/img] Y36/1
Y36/1y1
Y36/1y2
Y36/1y3
Y36/1y4
Y36/2
Y36/2y1
Y36/2y2
Y36/2y3
Y36/2y4

ABC front axle valve unit
Left front susp. strut regulating valve
Left front susp. strut check valve
Right front susp. strut regulating valve
Right front susp. strut check valve
ABC rear axle valve unit
Left rear susp. strut regulating valve
Left rear susp. strut check valve
Right rear susp. strut regulating valve
Right rear suspension strut check valve

Last edited by Hary Gahtoe; 06-06-2022 at 11:54 PM.
Old 06-08-2022, 10:36 AM
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Originally Posted by Tom Manning
I'm hoping you marked the four electrical connectors with their four different colour codes. Tell me you did..

If so then here's which connector goes to which solenoid.

Thanks for the reply Tom Manning. Apologies if my return was slightly vague as I'm dealing with multiple non related time sensitive issues that are messing with my abilities to fix the SL

The previous owner had done a fair amount of work and repairs. The Chassis wiring harnesses that normally are color coded are gone and each connector has 3-4 in. of bare wire to the connector where it plugs into the Servo.
I have since removed the rear valve block which is still pristine and mapped the colors to the coordinating Servo.
Thanks again
Hary
Old 06-10-2022, 05:01 PM
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I'm having troubles with wiring to my front valve block. Previous owner had work done and the harness wiring loom with corresponding Servo colors( shown above Yellow, Red, Blue, Green ) has been lost besides one.
Anyone who has seen or knows of a picture or schematic showing the actual individual dual wire colors supplied to the front valve block I would truly appreciate any help
Thanks
Old 04-12-2024, 08:18 PM
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1990 500SL, 1990 560SEC, 2010 ML63, 2007 SL550
Hello, did you find out which color wire combo goes to the Red locking solenoid and the yellow locking solenoid? I have a similar problem as the color code strip fell off which goes to which one? I have all the other correctly wired.
Thanks in advance
Old 04-13-2024, 12:27 PM
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1990 500SL, 1990 560SEC, 2010 ML63, 2007 SL550
Does anyone know the wire colors?

That go to the front red locking solonoid please?

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