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Looking for some help where possible. I am a newbie to repairing cars and willing to give anything a shot. One of my vehicles I'm having issues with is a C220d (2016) Manual AMG Premium Plus with air suspension. The suspension has dropped on a number of occasions randomly while driving. Generally it was the front of the vehicle but prior to my issue I am about to describe it has also been the whole car.
Up to recently, I have had intermittent issues with the front dropping whilst driving. Last week the car lost all power (including dashboard etc) while driving and the front of the car dropped with the error U0132FA - communication with the control unit "suspension" has a malfunction logged. I have since replaced the battery to eliminate the battery not supplying sufficient power and since doing so, the whole car has dropped and will not rise again with the error (in red) showing as 'stop vehicle too low'. No further errors have logged on the system.
I have pulled the fuses for the compressor and airmatic relay and turned the car over and put them back in again to see if it would flag any other errors but nothing. Has anyone else had a similar issue and any pointers on where / what to do next. Would replacing the fuses be a possible solution or could it be the compressor failing or the controller / sensor / relay unit?
Quick update, tested the fuse & relay and both operating as should, now down to potential issue with the pump as I can hear all corners creaking as if trying to raise but not successful in doing so. The hint may be in the whine coming from the pump which is recorded in the attached video above. If anyone can spare 2mins to have a listen and advise accordingly it would be greatly appreciated for any guidance offered.
On another note and possibly not related... Latest MOT noted suspension arm ball joint and track rod end with slight play, could this cause the whole system to fail?
I doubt it the two issues are related. The air suspension is great until it works and after that needs deep pockets or if owner is willing to try get it done alone. You have a couple of options. Let it be seen by a shop and to give you an estimate or you start working on it. In the end, it's a simple system. To me sounds like there is a massive leak and shouldn't be that difficult to locate. It could be the line, the dryer, the compressor, and the strut... assuming that there is enough air supply. Good luck! I have seen people switching to spring loaded struts at this point.
Ah, forgot to tell you, that the W205 is sophisticated machine where all is recorded. If you login with XENTRY or after market tools, I am sure you will see the errors in regards to the air issue.
Last edited by Turbodoni; Dec 29, 2023 at 02:40 PM.
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Airmatic fault - suspension has dropped
