SL/R230: ABC high pressure line / Pulsation Dampner
08-09-2016, 08:46 PM
#26
MBworld Guru
Sorry - my type - yes Y36/1. Now, it's possible this has changed with the ABC revisions that have been made over the production of the R230, but on my MY2011, the pressure hose from the pump goes to the front valve block first (I just got through changing it!) It may just be a pass-through on its way to the pressure supply valve, but it tells me that the diagram doesn't show everything.
08-10-2016, 01:13 AM
#27
Super Member
Thread Starter
After doing a rodeo nothing else popped up on a quick check so I new I might find something in a different section. While doing a failed level calibration I followed the ABC section back to history and I find 16k hits for C1000. Make matters worse I find 3 different names related to C1000.
Why it won't show on a quick check I have no answer.
After I match serial #'s for the corresponding modules turns out they're all the same; it's the ABC control unit.
Until a replacement arrives I'm going to remove all the underbody panels and double check all my hoses and valve block connections. If the valve block seals were tired I want to be sure the hoses are still within service tolerances and not cracking or swelling.
Why it won't show on a quick check I have no answer.
After I match serial #'s for the corresponding modules turns out they're all the same; it's the ABC control unit.
Until a replacement arrives I'm going to remove all the underbody panels and double check all my hoses and valve block connections. If the valve block seals were tired I want to be sure the hoses are still within service tolerances and not cracking or swelling.
08-10-2016, 02:03 AM
#28
Banned
If the ABC controller actually is the cause of your problem, then with power removed from the module the vehicle should maintain level.
Last edited by bobterry99; 08-10-2016 at 03:22 AM.
08-10-2016, 09:55 AM
#29
MBworld Guru
Yeah, I was looking at some diagrams in WIS and the front valve block definitely looks different.
08-10-2016, 10:10 AM
#30
Senior Member
I think this is an extremely good thread and I'm anxious to see the resolution. I do think it will be some sort of electrical problem in the system. moretech
08-10-2016, 01:45 PM
#31
Junior Member
Join Date: Aug 2008
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2003 SL500, 1998 E320 Wagon
This might sound dumb, but it's worth a try. The front of my dropped consistently after I shut the car off. And typically within 1 hour after turning the car off the front would be completely lowered with the red light Car too Low error when I would start the car.
Couple of weeks ago, I had the rear supply hose rupture on my way home. This is the main supply to the rear valve body. When I replaced that hose, and refilled the system, the car worked as before and the front end did not drop or lower at all when I shut the car off. The suspension stood up for two days with minimal droop.
Initially, my intention was to rebuild the valve block assemblies as it is well documented on this forum, but I was waiting for the cooler weather before I tackled that chore.
So, in summary, it might be worthwhile to flush the ABC system before tackling something that is more complicated.
Couple of weeks ago, I had the rear supply hose rupture on my way home. This is the main supply to the rear valve body. When I replaced that hose, and refilled the system, the car worked as before and the front end did not drop or lower at all when I shut the car off. The suspension stood up for two days with minimal droop.
Initially, my intention was to rebuild the valve block assemblies as it is well documented on this forum, but I was waiting for the cooler weather before I tackled that chore.
So, in summary, it might be worthwhile to flush the ABC system before tackling something that is more complicated.
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compaddict (08-10-2016)
08-10-2016, 04:06 PM
#32
Super Member
Thread Starter
This might sound dumb, but it's worth a try. The front of my dropped consistently after I shut the car off. And typically within 1 hour after turning the car off the front would be completely lowered with the red light Car too Low error when I would start the car.
Couple of weeks ago, I had the rear supply hose rupture on my way home. This is the main supply to the rear valve body. When I replaced that hose, and refilled the system, the car worked as before and the front end did not drop or lower at all when I shut the car off. The suspension stood up for two days with minimal droop.
Initially, my intention was to rebuild the valve block assemblies as it is well documented on this forum, but I was waiting for the cooler weather before I tackled that chore.
So, in summary, it might be worthwhile to flush the ABC system before tackling something that is more complicated.
Couple of weeks ago, I had the rear supply hose rupture on my way home. This is the main supply to the rear valve body. When I replaced that hose, and refilled the system, the car worked as before and the front end did not drop or lower at all when I shut the car off. The suspension stood up for two days with minimal droop.
Initially, my intention was to rebuild the valve block assemblies as it is well documented on this forum, but I was waiting for the cooler weather before I tackled that chore.
So, in summary, it might be worthwhile to flush the ABC system before tackling something that is more complicated.
I just finished doing another redeo and then tried a level calibration which failed. So now the next move is pulling off all my belly pans and panels covering the hoses and valve blocks to be sure something like you mentioned has/hasn't gone bad
05-02-2017, 06:32 PM
#33
MBWorld Fanatic!
Hey guys, I am finally getting around to replacing the front and rear accumulators or "pressure reservoirs" as MB calls them. While replacing the rear accumulator it makes sense to me to replace the return accumulator. Does anyone happen to have the part number for the return accumulator? Clearly the front and rear accumulators are the same part (A2203270115), but the return looks different to me in the WIS.
05-02-2017, 06:47 PM
#34
MBWorld Fanatic!
There are two bigger ones and two smaller ones IIRC, I would suggest, if you're doing some of them, do all of them.
2203270415 - return
2203270215 - pump/primary
From the ABC Drive carefully blog. He has everything listed there.
The big one is 2203270115 and is the same for front and rear.
2203270415 - return
2203270215 - pump/primary
From the ABC Drive carefully blog. He has everything listed there.
The big one is 2203270115 and is the same for front and rear.
Last edited by ItalianJoe1; 05-02-2017 at 06:59 PM.
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cal1 (05-02-2017)
05-02-2017, 07:30 PM
#35
MBWorld Fanatic!
There are two bigger ones and two smaller ones IIRC, I would suggest, if you're doing some of them, do all of them.
2203270415 - return
2203270215 - pump/primary
From the ABC Drive carefully blog. He has everything listed there.
The big one is 2203270115 and is the same for front and rear.
2203270415 - return
2203270215 - pump/primary
From the ABC Drive carefully blog. He has everything listed there.
The big one is 2203270115 and is the same for front and rear.
05-02-2017, 07:37 PM
#36
MBWorld Fanatic!
My car is much better after doing them. I had a line fail, drove the car back to my job as it was midnight and I wasn't far, i think that burned up the front seal on the pump.
I ended up dropping the subframe, doing the 3 lines under the engine, all 4 accumulators, and a pump. Much better now with everything leak-free and the suspension working as it should, I was getting the flash warning over big bumps prior to the accumulator replacement.
I ended up dropping the subframe, doing the 3 lines under the engine, all 4 accumulators, and a pump. Much better now with everything leak-free and the suspension working as it should, I was getting the flash warning over big bumps prior to the accumulator replacement.
04-15-2018, 12:14 PM
#37
Senior Member
When the engine is shut-off the pressure in the system rapidly decays. The pump quits making pressure, of course, and the front and rear accumulators as well as the pulsation dampener lose pressure as they empty. I believe Star Diagnosis has a test which monitors that rate of decay to discern the health of the accumulators.
I will try to post the graph later.
Thank you,
Radu
04-15-2018, 05:37 PM
#39
Banned
Troubleshooting by means of complaints or symptoms > Handling characteristics > Vehicle damping too soft or spongy handling characteristics > Pressure change during pressure release.
Follow the instructions to determine which accumulator is faulty.
Last edited by bobterry99; 04-15-2018 at 05:41 PM.
04-15-2018, 07:52 PM
#40
Senior Member
This is what I got.
Earlier today after a longer drive it was a continuous decaying line without the sudden drop 2/3 into the graph.
Last edited by gafitanu; 04-15-2018 at 07:56 PM.
10-28-2020, 10:33 PM
#41
Senior Member
Trying to find a part number for this hose...
Rodney I have read this old thread about the high pressure hose for 2007-2008 and ^ that runs from the ABC (Tandem pump) to the valve block in the left bumper cover in front of the left front wheel.
I had one repaired in 2019 (see the attached picture) and also found this number on it A 230 320 88 53 however so far I have not been able to located it on EPC.
At this time I like to get a replacement on order however my local dealer has not been able to identify it as well.
Did you by any chance know the part number?
Any feedback would be appreciated.
Best H
Overall View
Upper section were it connects to the pump
Lower section were it connects to the valve unit
Location were I found the number 230 320 88 53
Last edited by Hendrik Koster; 10-29-2020 at 03:21 PM.
10-29-2020, 10:45 AM
#43
Super Member
It looks correct to me. Item 380 in EPC, you might have to scroll over a couple of screens to see it on the diagram, but it is in there (unique to 472 submodel).
Mike
Mike
10-29-2020, 03:54 PM
#44
Senior Member
Correct part number
The assist is appreciated.
Happy motoring to all.
H
