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So I've replaced my ABC pump, seemingly fixed everything. Did the whole rodeo and this thing throws itself around like never before, rides great. Unfortunately if you turn it off and let it sit the pressure switch slowly drops down to about 100-150 psi and when started again the pump doesn't kick on and it gives a red ABC light. But if you start the car and apply the slightest of pressure to the ABC reservoir it immediately shoots up to 2700-2800psi, no ABC warning at all and it works perfectly fine- without failure. From what I can see there are absolutely no leaks, maybe some drips from ABC fluid I've spilled before, but the level in the reservoir doesn't change at all. Completely lost can't figure it out, it's maybe worth noting that I only currently have access to an advanced Autel and Snap-On scanner, and while they can do the entire dynamic test, pitch and roll test, etc but they seemingly can't do the advanced diagnostics that I see people talking about with STAR/SDS where they can supposedly pinpoint where the leak is coming from. Please help
Have you tried driving it or is it sitting stationary being worked on ?
my car will leak down and red abc will turn on upon restart - and the red warning will stay on until I start driving the car a few feet , then the car comes up and red warnings go away
The act of driving away is similar to your pressurizing of the system
as for why the pressure is dropping when left off , it’s the o rings in the valve blocks and accumulators need changing
I was thinking it was one of the valve blocks/accumulators, I've driven it after I pressurized it and kicked the pump back on and it worked perfectly fine. But when it gives me the red ABC light I haven't driven it. Do you think that would work? Also it might be worth noting- when parked the vehicle moves itself around slowly raising the suspension and then dropping it, when put into gear and moved it immediately levels itself though. This happened before replacing the pump and now after, don't know if it's normal. Thanks for the help.
Yes the problem is the accumulators and o rings in the valve blocks
but if the red warning goes away by just driving off you can just drive too
So new problem, while the whole system seems to work as described before, now it's regurgitating 1.5-2L of fluid from the reservoir dipstick when turned off and left to sit for over about and hour?? No clue why... couldn't find anything on the forums about this.
Same problem . Your accumulators are metal ***** with rubber bladders inside them
you have a hole in the rubber bladder inside the metal ball that is filling with fluid . When the system pressurizes, it gets spit out lol
you need to change your accumulators to stop the spitting , and you need to change the o rings in the valve blocks if you want it to stop dropping
Gotcha, so I've heard there's repair kits for these to do it on the cheap side, any suggestions?
Edit- Found one on ebay that seems to be what I'm looking for: https://www.ebay.com/itm/Mercedes-AB...s/153290862013
The repair kit is fairly cheap, but I really do not want to drop another 600 dollars on replacing all the accumulators and fluid, do you think I could just replace the accumulator that's on the block and it would fix it for now? or should I just bite the bullet and buy all of them
When I started driving a Mercedes, I realized that I had to change my attitude toward maintenance and repairs...
You are driving a luxury automobile that, in today's dollars, would cost you between $150,000 and $200,000. If you took it to the dealer to get the suspension repaired, your bill would probably be between $5000 and $10,000. Less than $700 IS a cheap repair, especially after eighteen years of service.
Can you kindly post a picture of where you can see that leak please.
Haven't pulled it out of the vehicle yet, doing it this weekend but I ordered a whole new reman unit and pointed to where I could see it leaking from on the vehicle. Also I have another question, the feed for the ABC reservoir on this remanned unit is point in the opposite direction... I don't think that means it'll be impossible to mount but I'll need a different hose as these seem to be press fit in, every part number seems to match. Is this normal? will it work?
Haven't pulled it out of the vehicle yet, doing it this weekend but I ordered a whole new reman unit and pointed to where I could see it leaking from on the vehicle. Also I have another question, the feed for the ABC reservoir on this remanned unit is point in the opposite direction... I don't think that means it'll be impossible to mount but I'll need a different hose as these seem to be press fit in, every part number seems to match. Is this normal? will it work?
Honestly I have no idea, in my case the passenger side of the car is sagging when parked for a few hours so I ordered the valve block seal package from ebay and I will start working on them tomorrow, in parallel with a couple of other things so it might take some time.
I hope everything worked out with you great and the problem is solved.
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