JAD.MC

Hi guys! My cls is a 2012 had it for 2 years but since I bought it everytime I park I hear this burst of air and the car lowers just a little! ( I think this is normal) the issue is when I leave the car parked for 2 days or more the car droped like a low rider! Is that noraml?
as soon as I open the doors I hear another burst of air and the car start lvling up to normal and by the time I'm ready to put in drive and start driving everything is normal!
If I'm driving the car everyday I can't see anyproblem the car is a regular lvl and all seems good.
​​​​​​​I thank you for ur feed back

tasho3

You have a leak somewhere.

Mine was doing the same intermittently. Sometimes it would drop right rear after 4-5 hours of it being parked. Had it replaced at MB through my warranty company.

JAD.MC

Yeah, daily drive no problem but if it's parked at least a day then starts lowering down!
that what is they changed? Did u know.

Jan AMG

Interesting, I was observing the same today on mine..
One side was lower than the other. Could be uneven surface height though, did not hear any air bursts.
Airmatic is quite okay to fix, meaning will not take too much time or money.

Jan AMG

Anyway, you can watch this thread or search on the forum.

tasho3

Had the shock replaced.

brainstormer1

What your hearing is the pressure relief valve. I worry if I don't hear anything, because they have a propensity for going out.

Mikeki7

Any sagging in a day is definitely a leak. If it sags on one side then it is probably a strut, if it sags on both then probably a leak somewhere around the compressor area. If you don't hear the pressure relief then yeah I would be worried as well. I had my car sit for almost a month and it stayed level. Only time the car releases all the air is when you jack it up on one side and it wants to even itself out.

JAD.MC

I checked the car after a while and it is slightly lower on the right side then the left. Just a bit lower but definitely both are slammed. Nothing is abnormal while driving! Still everytime I Parke the pressure release is there as normal and the car lower like 1/2 inch and stay there. And next morning it's 2 inches lower and by the third day slammed!!!!
I'm wondering what s the best way to diagnose a leak?! I don't want to just buy bellows and change them for no reason! Thx

GermanCars

You are going to want to get this fixed sooner than later. The air pump is not designed for continuous duty. Another words, the more it has to run to keep up with a leak, the sooner it too will fail.

Dharm

I just went through this issue last week. I was dropping about an 1.5" to 2" on the passenger side so I ended up changing the rear bags out with Arnott units. Very easy. Disconnect the sway bar link and shock, drop the arm and it comes out and goes in very easy. Replacing the bags did not remedy the issue so I ended up installing a new air distribution block and the problem has been resolved. My bags were probably fine. lol