Johnny Maserati

Hey guys

I replaced a leaking front shock and high pressure expansion house on my 2000 CL500. It was driving great for 2 days then the 3rd day I hit a couple little bumps in the road and red ABC do not drive car too low error came on dash and wouldn't raise up like normal until I came to a complete stop. Then it was raise up and red error go away until I hit another bump in the road. What's the problem here??

Welwynnick

Sounds like it might be accumulators, but you really need to get the diagnostic trouble codes read.


Nick

Johnny Maserati

I did the push test and the front doesn't budge much but the rear end is bouncy. Should I start with replacing the rear accumulator?

Welwynnick

Did you do the push test with the engine off? If so, that doesn't tell you much, as the struts are hydraulically isolated from the rest of the ABC system, and you're just bouncing the springs. It could be that you have low hydraulic pressure, in which case you need MB STAR to do proper diagnostics.


Nick

2014CL600

Accumulators are most likely weak if the rear bounces. If your car is actually low and will not budge you might have a bad valve block. That system on the W215 was the worst!!! I had 5 of those cars. The W216 was a heavily revised system and they will put the revised parts on your car, when they replace them. All I can say is GOOD luck and hope you have saved up a large chunk of cash.

Johnny Maserati

I did the push test with the engine running and the front bounces also but not as much as the rear.

Johnny Maserati

I already poured a bunch of cash into it already. Well anyway I did the push test with the engine running and the front bounces also but not as much as the rear. Should I start with changing both accumulators? It's still raising up when I first start driving it for the day and when it does drop it rises back up when I come to a compete stop.

2014CL600

Ok, so you definately need front and rear accumulators but is the car sitting low when running? If not you have a bad height sensor. Does it drop after turn off or is it level all the time? Also, your pump could be weak which is causing the error. You really need to take it to a MBZ authorized dealer.

Johnny Maserati

The only times I can tell if it's rising or dropping is when the red ABC light comes on while I'm driving and it rises up when I come to a stop. It's never sitting noticeably low when the engine is off or on. Shocks aren't an issue I've replaced the leaky ones. When I replaced the high pressure hose last week it drove great for 2 days no red ABC light

2014CL600

Pm me I'll talk you though it

tusabes

Change all 4 accumulators it's time . They all fail due to age

Then See if anything else can is going wrong . You should be good after changing all 4 accumlators

Johnny Maserati

Idk how to work the pm. this is my exact fb name can you fb message me?

Johnny Maserati

@tussabae thnx

2014CL600

I'm not sure what car you have but the ABC system's for the W215 and W220, only have 3 accumulators. Sent you a PM

tusabes

there are 4

2014CL600

Please show me where there are three in this diagram.

tusabes

I gave you the part numbers for all 4 , your diagram does not show them all

2014CL600

Well, I had a problematic 2004 and had all of mine replaced and there were only three.


I have had four of the W215 models 2000, 2004, 2005 and 2006, so I pretty versed on these cars and their issues. If you have another factory diagram different from this one, would you please provide it for us. Hope this clears it up for anyone needing help with there W215. I hope I have helped. Good luck with finding your problem.

tusabes

The one you're missing is A220-327-02-15

You can google that part number for pics and description

2014CL600

I just looked it up and it is the front one. They don't show two in the front unless I am missing something that the factory has neglected to show. I could be wrong but when I had mine replaced they only replaced three. They said they would do them all when your opening up the system. I had a bad block but all of this was actually done in warranty in late 06 on the 2004. The worst car I had ever owned, btw. I had 2 going at once and bought the 06 when the 07 model came out and traded off the 04 and 05.

tusabes

its not the same as The front and rear axle accumulators (You need two) is: A220-327-01-15
Your text description lists these two


The third is mounted to the front right pressure relief valve Part #A220-327-02-15
The fourth is near the fuel pump in the driver side center of the vehicle, (Part #A220-320-04-15)

2014CL600

...

2014CL600

. I think your confusing the pulsation dampener with an accumulator.

tusabes

They are all known as accumulators. This is the one you keep missing
http://www.partsbase.org/parts/mercedes-a2203270215/

As you can see it's also called an accumulator .

In your latest picture you can see all 4- One attached to the left front valve block , one attached to the right front pressure sensing valve , one in the center of the car attached to the valve block , and one in the far rear of the car. All 4 need replacement due to age

they are all accumulators and described as such by Mercedes. I provided the part numbers of all 4 . And there are 4 of them. Not three.

Mercedes has used the terminology of "accumlators , nitrogen spheres , air cells, pressure dampener" in various documents, but they are all the black sphere devices that separate fluid and a nitrogen charge. And there's 4 of them which all need replacement.

2014CL600

Ok, please don't think I'm trying to be a know it all or a douche bag. I called Mercedes, just now, and they said there are only 3 nitrogen filled bulbs. The 4th one you are talking about is what they call an Air cell and is not considered to be an accumulator. I do see what you are saying. They actually said there are only 3 accumulators and the rest are pressure valves but not all are nitrogen filled. Thank you for showing us the diagram. I see what you are talking about. It does look like there are 4 in total.