Mercedes Benz ABC valve block solenoid oil seal repair fix rebuild kit seals o rings Install

Link to purchase product: https://x8r.co.uk/mercedes-benz-abc-h...

The Problem

Vehicle sags on one or more corner after shut off.

The ABC system on Mercedes Benz vehicles is a computer controlled hydraulic system, the system adds / removes fluid from the struts, the objective being to keep the chassis level at all times. This is a great system when fully functional.
A common failure point of this system is the valve blocks. This manifest itself as one or more corners of the vehicle sagging or lowering when the vehicle is parked after a few hours or days (longer term sagging isn’t necessary cause for concern). Or one or more corner raising shortly after vehicle shut off.
The valve block fails to make a good seal allowing fluid to escape the strut and return to the reservoir leading to the corner sagging. This failure to seal is more often than not caused by the O-rings deteriorating within the valve block solenoids, most likely the locking valve.
There are two valve blocks on each vehicle. One controls the front struts the other the rear. Each valve block has two locking valves and two control valves. The locking valve locks the level of the strut once the vehicle is turned off.
If any residue is stuck in the solenoid the plunger will not seal correctly and strut fluid will be lost resulting in that corner of the car sagging. Such residue is normally caused by the original O-rings deteriorating. Alongside the O-rings are backup rings to maintain the shape of the O-rings under pressure. Some valve block solenoids are fitted with nitrile back up rings, like the nitrile O-rings these deteriorate and can clog the plunger.


Symptoms of the fault

Car sagged, dropped, lower, down, lowered, at one or more corner after short period of time after vehicle shut off. Vehicle raised at one corner after shutting off. Common fault codes: “Too Low” warning on dash, C1525-001, C1525-002, C1525-004 or C1525-00.

Vehicles affected and compatibility

C215 CL Class 2000-2006 : CL500, CL600, CL55 AMG, CL63 AMG, CL65 AMG.

C216 CL Class 2006+ : CL500, CL600, CL55 AMG, CL63 AMG, CL65 AMG.

R230 SL Class 2003-2012 : SL320, SL500, SL550, SL55 AMG, SL600, SL65 AMG.
W220 S Class 1998-2006: S280, S320, S350, S430, S500, S600, S55 AMG, S65 AMG.

W221 S Class 2005-2013 : S280, S300, S350, S400, S450, S500, S550, S600, S63 AMG, S65 AMG .


In around 2007 the design of the valve block changed, our repair kit fits the design previous to the change in 2007. The later valves don’t tend to fail in the same way. If your valve block has been changed in its life it is possible it was changed to the newer version. To determine this the ABC pump can be inspected on the upper right side of the engine; If a black sphere is attached to the pump it is the 2007+ model.
Associated part numbers:
A2203280031, A2203200358, A2203201258, A2203200031.


Our solution

A full overhaul kit to repair the ABC valve, constructed of the finest materials to last the life of the vehicle.

Our complete overhaul kit includes all components required to restore the valve block. Our kit is for one valve block.

Our kit includes:
Replacement O-rings to replace original O-rings on the valve block solenoids. Our O-rings are constructed of Viton a vastly improved material suited to the fitting environment so will not deteriorate like the original part. Resolving existing faults and stopping them reoccurring.
Replacement support rings, these are constructed of PTFE to last the life of the vehicle. These replace the original nitrile support rings which if fitted to the valves tend to wear and cause issues. Our rings are a split design allowing easy install.
Replacement solenoid retaining clips x2, more often than not the originals snap when removing, we include x2 replacements to allow easy repair.
Replacement weather seals for the control valves. The original seals tend to deteriorate and are often damaged when removing the valves. Others try to seal this stacking O-rings we don’t believe this is the best solution so have moulded replacement seals to ensure a weather tight seal.

All components are labelled for easy install. Please check out our picture instructions and videos to see our comprehensive repair kit in action. Designed and engineered to resolve ABC valve faults for the life of the vehicle.

You will receive

14x Viton O-rings
14x PTFE split design support rings
2x Replacement valve retaining clips
2x Weather seals for control valves
4x Stickers to mark valve positions

This allows repair of 1 valve block, front or rear. If you wish to repair front and rear you will need two kits.