E550 Airmatic HELP !!!!!
Have you checked the rear shocks for leaks? I'm not talking about the air springs. The shocks do help to provide support as well as ride comfort. Like any shock you can see leaks or check their rebound. How many miles are on your car?
I have had 2 Airmatic equipped cars and although I have only had minor faults I get it that they can be a real pain sometimes.




You say you checked the level sensors. How? How do you know they are reading correctly?
If the level sensors are fine and you have replased each air spring control valve and the compressor the thing left is the control module for the AirMatic system. I don’t know where it is but troubleshooting logic says it is the only thing left as the possible problem.
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My recommendation is to read through the other forums and search for Airmatic issues since the system is pretty much the same across all the various models that use it. I came across this thread which tells you how to lock the system in the up position.
Don't give up yet!
Bob




Reading about the problem i got a question , did you change any control arms , or bushings , anything suspension related?
or you just need to get it recalibrated.





