rtbrjason

Hello all..

I'm getting a dash warning showing the car with an up arrow and the word malfunction.

I was able to read the code as "(5350 AG/1Y1) Airmatic pressure relief valve open circuit."

I cleared the code and it came back immediately. Nothing appears to be wrong. No sagging on any corners over night, the raise car button appears to work as well as all the different airmatic modes.

Most of the searching around I did indicated a fuse out or possible pump replacement but as everything appears to work as normal I'm a bit confused. Has anyone here dealt with this issue on a w211? Mine is an 07 E550. Appreciate any help.

Plutoe

You can speculate all you want,but first change the faulty valve!

NCTRNL

Yeah it seems that something is not responding electronically.

Either you have a frayed electrical connector or you forgot to plug something in.

kajtek1

Pressure relief valve is build-in on the compressor.
Once you get there, check the plug, clean it and measure the valve resistance.

rtbrjason

Thanks. I've never messed with the compressor or even seen it. No recent work on the car or anything, just popped this error over the weekend after some regular driving around.

I'll try to see if a connector came loose or a wire took some damage. I find the compressor on the driver side behind the bumper right? Access from the wheel well?

kajtek1

To some degree you access it via wheel well, to some degree by removing bottom pans.
If you have car lift- remove bottom panel and see if you can reach the electrical connectors.
With only car jack (AND STAND) you have to go via wheel well.

NCTRNL

Yeah, not sure about the E550 but on my E500 you can see it easiest by jacking up the car, taking off the wheel and removing the front part of the wheel well. Everything is visible at that point.

nicebwoi90

Had the similar problem, my car stayed up though, happend while i was driving to florida and stayed up all the way back to NY. Remove driver side wheel, remove the panel in wheel well area and look for wire damage on the compressor. here is the video that helped me solve my problem.

rtbrjason

The broken wire ended up being the issue. I was able to patch it up for now but I'm not sure how long that fix will last.

I searched a bit but couldn't find a replacement harness available. Does anyone have the part number?

Where does the other end of this 2 wire connection go?

MyNewHooker

Ive been searching for a long time about this issue, I have the fully inflated airmatic issue as well. I'm about to go and check on the wires, will reply if its the same problem. 2007 E63, thank you so much for the video!

MyNewHooker

Turned out to be a broken line on the air pressure relief valve

Long Islander

Does this fix apply to wagons that have rear airmatic only? Are the connectors in the same location?

kajtek1

rear air has less connectors, but the same main compressor in the same location.