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Old 06-18-2005, 05:57 PM   #1 (permalink)
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2001 S500 Airmatic Problem

Well the air suspension on my fathers s500 has completely collapsed. The air shocks are all deflated and when the car is started it says airmatic rising on the control screen but the car doesnt rise. Is this an air compressor failure? A while ago we noticed the compressor had been coming on very often which seemed out of the ordinary and the car had a slightly bumpy ride on even the smoothest pavement, we thought it might have been the wheels requiring balancing, but this makes me think it could have been the suspension? Any help would be appreciated on what we can do to fix this, thank you.
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Old 06-18-2005, 11:53 PM   #2 (permalink)
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RE: 2001 S500 Airmatic Problem

I would say the compressor is defective.

Point is, your stealership needs to eliminate the root cause.
This is either a defective compressor relay, or a leakage in the system.

Cheers Frank
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Old 06-19-2005, 07:25 AM   #3 (permalink)
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RE: 2001 S500 Airmatic Problem

Frank is correct.

A leak in the system will cause the compressor to cycle on frequently, wearing it out.

The compressor relay has also been known to stick "on" causing premature compressor failure, without a leak (I don't know if this condition can cause overpressure that would create a leak, or if there is some kind of pressure relief that would prevent it). This is a common problem, and if it is the cause, I'd make some noise about it. Depending on the mileage and maintenance record of the car, Mercedes may offer "customer assistance" in the repair if the car is out of warranty (including extended warranty).

In any case, it seems that one problem or the other has caused the compressor to fail.
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Old 06-19-2005, 08:46 AM   #4 (permalink)
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RE: 2001 S500 Airmatic Problem

Had a similar problem on my 2001 S430. There was a small leak which caused just the fron left wheel to totally collaps. Leak was repaired. Problem fixed. It sounds to me that you either have a leak or a bad compressor or both. This shouldn't be hard for the dealer to fix and is a VERY common problem.
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Old 06-19-2005, 09:00 AM   #5 (permalink)
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RE: 2001 S500 Airmatic Problem

Thanks for the help. The problem is that the car is no longer under warranty, but all the air bags are collapsed so we believe its the compressor. If it is a leak that is causing this then once we replace the compressor eventually only the leaking bags will deflate when the car is off, correct?
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Old 06-19-2005, 09:01 AM   #6 (permalink)
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RE: 2001 S500 Airmatic Problem

Quote:
mhorkey - 6/19/2005 11:46 AM

Had a similar problem on my 2001 S430. There was a small leak which caused just the fron left wheel to totally collaps. Leak was repaired. Problem fixed. It sounds to me that you either have a leak or a bad compressor or both. This shouldn't be hard for the dealer to fix and is a VERY common problem.
If you dont mind me asking how much did it cost for the dealer to fix this for you?
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Old 06-19-2005, 11:30 AM   #7 (permalink)
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RE: 2001 S500 Airmatic Problem

My cost estimation is:

Compressor is €250 to €350.
Leakage search (with dish liquid) appr 30min
Changing compressor appr. 30 min.

If the leakage is on the top of the shock leg, there is a repair solution available which takes 1,5 hrs to apply.


There is usually NO need to buy new shock legs nor the compressor with valves.

If the stealership wants to charge you anyway, he should have a good explanation...


CU, Frank
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Old 06-19-2005, 11:41 AM   #8 (permalink)
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RE: 2001 S500 Airmatic Problem

Thanks Frank, on more question, how difficult would it be to get to the air compressor? I remember reading a thread and it was mentioned that it is between the front right wheel and the bumper. We have a chance to pick up an air pump used for very cheap so we figure we can probably replace this ourselves.
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Old 06-19-2005, 11:49 PM   #9 (permalink)
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RE: 2001 S500 Airmatic Problem

Hi 04.

Although the compressor is easily acccessable, i strongly recommend to let a professional do the work.

Cheers, Frank
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Old 06-20-2005, 09:24 AM   #10 (permalink)
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RE: 2001 S500 Airmatic Problem

I don't know where you are located, but I had an issue with that too, as it is a known problem on earlier w220.

Here in Canada, I had to pay for investigation, and MB Canada offered to pay half of the defective part, i.e. the compressor.

Since MB knows about that problem, a good dealership will ask MB to offer you something if the car is no longer under warranty.

Good luck !
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