W212E550

So I got an 2011 E550, and it recently started lowering the rear air suspension when parked. Sometimes this happens within 5 minutes after parked. And when I unlock the car it goes back up (without starting the car)

Johnny Rad

Peachy

I had this problem but it would happen overnight, not in five minutes. When I opened my door it would raise back to normal levels.

My air strut on the driver side rear was leaking and my air spring on my passenger side rear was leaking. Had both struts and both springs replaced in the rear. Doesn't happen anymore.

Your problem may or may not be the same as mine, but that was my experience.

Ungarisch

Yeah, same symptom as my car was doing a few years ago, but the rear lowering hasn't happened in a while for me, especially not since the issue switched to the front lowering instead, which started occurring since about 6 months ago, getting progressively worse.
https://mbworld.org/forums/e-class-w...replacing.html

When I had issue with the rear it could go either way, it sometimes lowered in the course of 5 minutes, sometimes only overnight. But like my other thread says, the symptoms completely flipped on me, the rear has not collapsed in maybe 2 years, so it kind of fixed itself, while ever since about 6 months ago the front has started collapsing in sport mode for some reason.

Maybe the 2 symptoms are related, maybe not. All I do know for sure is that the air is escaping from the pressure relief valve and not from any leaks.