M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

Any experience with ebay air suspension compressor?

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Old 09-28-2019, 04:59 AM
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Any experience with ebay air suspension compressor?

Other than Amk or Arnott does anyone used the compressor's from ebay? Any input would be greatly appreciated. Especially if there a member that is currently using one.
Old 09-28-2019, 06:09 AM
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Have you checked for code/s in the Airmatic Control Module? The compressor might not be your problem.
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Old 09-28-2019, 06:28 AM
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Yes I did as well as opened the pump cleaned it and put it back. It worked little but very low pressure didnt raise the car which makes me think I might have bad valve block.. but the compressor is done.
Old 09-28-2019, 06:33 AM
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Originally Posted by 51mike
Yes I did as well as opened the pump cleaned it and put it back. It worked little but very low pressure didnt raise the car which makes me think I might have bad valve block.. but the compressor is done.
Btw Maj. Thank you very much for being very helpful.
Old 09-28-2019, 07:30 AM
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What were the codes in the Airmatic Module?
Old 09-28-2019, 01:25 PM
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5400 and 5508 where the codes.
Old 09-28-2019, 04:30 PM
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Code 5400-The first thing you must do is swap relay KG, in the Eng. Comp. Fuse/Relay Box, with a similar color relay.

Code 5508-You must check for leaks in the pressure line system. That means under the veh. where the reservoir is located and at each and every strut.
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Old 09-29-2019, 12:08 AM
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First thing I did was swap that relay as well as measure the resistance while applying 12v to and with no power. Both test relay was good and it is the green hella one. I ordered another relay check resistance mine was 86.6 ohms and new one was 70 ohms so I didnt buy it.

One thing I noticed is when the compressor was running there was no air pumped to the system, which I know the compressor is not that strong but still there should have been some air in the system.
I feel like the valve block is not opening the valves..
I checked for leaks soap water but there is no air in the system to catch leaks.
Old 09-29-2019, 09:31 AM
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Check to see if fuse #108 is blown in the Eng. Comp. Fuse/Relay box.

If not, remove the two wire conn. Gray/White and Brown at the Airmatic Pump, A9/1m1, then apply 12v to the Gray/White wire and ground to the Brown wire. The pump should run, but DO NOT run it for more than 3- 5 seconds.
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Fuse #108 in F58..pdf (129.1 KB, 91 views)

Last edited by Maj. Dundee; 09-29-2019 at 09:33 AM.
Old 09-29-2019, 04:10 PM
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Fuse 108 I checked it before it gets battery power as well as it was not blown. I gave the compressor power and it was working but again it seems like air was not passing passed the valve block. Before the compressor was not engaging but after I opened and cleaned the compressor it engages but turns off quick and yet again no air seems to be passing through the valve. Oh the compressor started making rattling noise now...
Old 09-30-2019, 07:21 AM
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So it is not the compressor as you previously thought. Actuate the pump again and after things fail, immediately check for codes.

Also check the Reduction Valve.

Last edited by Maj. Dundee; 09-30-2019 at 07:24 AM.
Old 09-30-2019, 02:32 PM
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The code I get is 5508 and what is reduction valve? Is that the one arrow to it? How do I check it? I applied 12v it clicks....
Old 09-30-2019, 02:59 PM
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Originally Posted by 51mike
The code I get is 5508 and what is reduction valve? Is that the one arrow to it? How do I check it? I applied 12v it clicks....
Of course it's the one with the arrow. What it does will take some time to find out.

No one instructed you to apply voltage to that valve. If you make a mistake I have to find the problem.
Old 10-01-2019, 03:00 AM
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Maj I know you are the only one who has been answering my questions which I really appreciate.
But what I do not appreciate is someone talking to me the way you did on the last post. Remember we are here to help each other.... anyways again thank you for your help. I will fix the problem and updated the post.
Old 03-29-2020, 06:44 PM
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Changed the airomatic compressor and problem was solved.

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