ABC valve cleaning DIY MercedesBenz Forum

12 Июн 2015 | Author: | No comments yet »
Who rebuilt Mercedes abc valve blocks?

ABC valve cleaning DIY

Car: Mercedes SL500

Symptoms: front drops 3-4” 1 hour after engine is after engine start car goes to normal. Red ABC ‘low warning message is displayed time I start the car but goes in 30 sec or so.

Since there where no leaks on shocks/lines it must be leak in ABC valve block. description of ABC suspension is here ABC

So after reading many I thought I should try cleaning before replacing them unit I can find was $1200 ESC tuning

here is place where rebuild them

It took 3 of pretty dirty and unpleasant but results are impressive – car stopped and ride became much stiff and sporty.

Because I find anywhere in internet on how exactly to clean ABC valve I thought I would write DIY sequence here:

1. Block raise front axe and remove left wheel and wheel

A lot of pictures can be found here


2. residual pressure with front wheels off the ground small bleeding screws on the shock lines

3. Now you are ready to remove valve and take it home for cleaning. are many ways how you can do it but here is I did:

a. Disconnect Line 1 and 2 from aluminum Block 1 Pic 1. To contamination in hydraulic system I put wrap/electrical tape at the end of each Oh and use gloves!

b. Remove 10 mm Bolt 1 holds Block 1 on bracket and connector to the sensor, slide 1 to the side

c. Remove Lines 3-5

d. are 3 10 mm nuts which hold block – now you can access them and Valve Block

e. Carefully mark and remove 4 connectors — they are

Who rebuilt Mercedes abc valve blocks?

f. Put plastic tray under car lines are not leaking badly but I got 0.5 l of oil 2 hours. 4. Now with Valve off the car you can take pressure damper and brackets off (big black and black metal plates, all 10 mm)

5. clean block outside ethanol and remove Plastic which holds valves plastic clip between valves is shown on Pic.2 here I will write for Valves only, Regulating are similar). Plastic clips are Use two pair of pliers to press on both sides and slide out

6. Use adjustable pliers to carefully valve (garb at the VALVE to 45 degree angle: after wiggling it should come

7. There is a spring for each valve – do not miss them! of all valves taken apart is

8. Clean valve with tissue/ethanol, Pic.3, remove and clean its internal o-ring blue 0-ring was very Check valve seat for There are 3 areas which can leak: dirty valve leaking o-ring or weak spring. To be safe I stretched for a bit.

9. For regulating valves plunger is not so I just pushed it back and with pliers while with ethanol.

10. Put everything together (except front liner), check fluid in ABC tank, add Pentosin 11s if necessary. engine with wheels on the and stop after 1-2min for min, add more Pentosin. Now you are to bleed the system – slowly through height modes 15 it should be enough. Go check for around valve block. If are no leaks put liner back.

11. Open your beer and – you just fixed your and saved yourself $2000!

PS To be you don’t have to remove block to clean valves, but it is much easier to do so for the first

interesting records


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