S600 ABC issues
I'm very interested in an S600.
But there's no possibility to get a warranty in my country and I'm afraid of ABC issues.
So I'm collecting data regarding ABC issues from S600 owners.
If you don't mind, I would like to know of ABC issues you had on your S600.
Thanks in advance.
Regards,
Mouhamed
There are tons of info about airmatic but much less about ABC (on W221/216 chassis).
Based on my research, I also think that ABC is more reliable on the W221 chassis. I also think that ABC may be more reliable that airmatic. More costly parts but less issues. This thread is a way for me to try and confirm this point of view.
https://mbworld.org/forums/m275-v12-...on-thread.html
The manufacturer's and dealers' approach to ABC is to treat it as a fit-and-forget system - until it goes wrong - then throw money at it.
I think this is completely wrong. Its far too complex for that, and it needs appropriate regular maintenance.
This is my approach:
Every two or three years –
- Replace the ABC oil and filter.
- Remove all the plastic under-trays and wheel arch liners.
- Inspect every ABC component –paying particular attention to the flexible hoses.
- The crimped joints always fail eventually, so if the hose is wet, repair or replace it, or it will let you down badly.
- Cut the old pipe out and replace it with a new section with 10mm compression joints.
- When the wheels are off the ground, rotate the metal collars on the quick-release connectors – they always seize.
- Allow a few minutes for the pressure to drop, and take the weight off the wheels.
- Drain as much oil as possible by compressing the strut with the bleed valve open – this oil is usually dirty.
- Remove the bleed nipples & covers and fit new ones if corroded.
- Make sure you have a scissor jack or pillar jack to hand – there’s not much room for a trolley jack when the car’s on its bump stops.
- Check the condition of all the bushes and ball joints using force.
- If you get a red ABC warning, stop the car and fix the fault.
- Don’t run the engine – a few seconds is probably OK, but a few minutes is not.
- The pump must be primed – even if the reservoir is full it won’t prime itself.
- You can prime the pump with a few PSI of compressed air in the part-filled reservoir.
- Alternatively, you can remove the poly-V belt and spin the pump by hand until you feel resistance.
- If you need suspension fluid, buy CHF-11S from an accessory shop.
- If you need a suspension strut, buy a remanufactured one.
- If you need hydraulic hoses, go to a hydraulic hose shop.
- If you need a pump, buy a serviceable used one.
- If you need O-rings, find someone who sells O-rings.
Go to this thread and go to my latest post to see the up to date list of repairs that have been made thus far over 3 years. I'm sure there's a lot more to come as it ages and mileage increases:
https://mbworld.org/forums/s-class-w...ms-thread.html
They are expensive cars, and have expensive maintenance. Just the way it goes.







