One side is lower than the other.
hubi
My rear suspension is about half an inch lower on rear passenger side than on rear driver side. I've look around today with soap and water, seems to me there is no leak is the hoses or anywhere. Anybody knows how to set or reset rear stabilising unit electronics ?
When I wake up every morning, the passenger rear side suspension is completely dropped. When I start the engine, it comes up in about 30 seconds.
Anyone has an idea what this can be ?
Thanks very much !

If the car had steel springs, it could be from one spring being broken (cut). If the car has had front springs changed, it could be from incorrect installation of the springs.
The rear has anyway only one level sensor. If that sensor misbehaves, it cannot make the car tilt.
As above, leaking air springs (or valves) can make the car drop over night and it can happen for one corner only.
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I'm not sure of one thing : how do I change the air spring (on photo) ? Is it a big job ? Can I do it myself ?
Thanks guys !
Last edited by rickyleb; Dec 11, 2011 at 07:29 PM.
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However you can cut and splice the line and not pull the diff.
The reason MB doesn't want you to cut the line is the risk of total failure and
collaps of the rear suspension while driving. So It really just depends on how confident you are to splice the air line.
Since december 2011, I had only problems with the rear suspension of my 2004 E320 Wagon. Beautiful car, wonderful ride, but damn the suspension is getting me crazy.
First, the car always looked tilted when it was parked. Then, it started to get dangerously low and when I started the car, the compressor would bring everything back to normal. I went to my mecanic and he said he couldn't see any leak in the system. So I deciced to buy a brand new air spring from Mercedes Benz.
After three months of usage, the second airspring exploded while I was driving. No hurt, but the car went "too low" and I had to tow it. By the way, even with that new air spring, the car always looked tilted.
I went back to the dealership with my "new" airspring which was exploded and they told me it's not covered under warranty. Thank you very much. So I had to buy a new one if I wanted to drive my car. So I did.
This time I had it installed by the dealership because they were arguing it was a wrong installation, which I absolutely do not believe, and the problem is still there. THE CAR IS TILTED. Unbelievable !
I've been driving with my 3rd air spring for 4 months now without any problem, but the car is about 1 inch lower on the rear passenger side. My mecanic scanned it with star diagnostic system (sds) and it showed no error. We tried to adjust it "automatically" but it would always stay tilted. We adjusted it "manually" with the sds and the car looked great. But only for a couple of days. As soon as it was parked for a few days, I went tilted again.
What should I do ? Buy a conversion kit and get rid of that airmatic crap ? Is there any existing solution for the airmatic ? How can I get my car not to be tilted all the time ?
Please, help me guys !
Leaky air springs can leak in a fold and not leak at the same rate. Over night cooling can cause the hole to open up and vent more. I have actually found leaks where the bag folds onto itself. You either have a adjustment off or air bag leaking.




My wagon with rear air only has driver rear side 1/2" lower than passenger side.
I am studying the system and as DB posted above, there is only 1 level sensor in the rear, but each bag has separate valve that allows computer to lift sides individually.
To my surprise, my steel front suspension has level sensors.
I've been dealing with RV air suspension for years and with older. mechanical suspension it always is that one axle (usually rear) is leveling side to side, while other axle(s) have single valve that give even pressure to both sides.
In W211 case I have no idea what computer does and wonder if any DIY ever figure it out?
I am tempted to adjust front sensor hoping that will level rear, but will I help computer to work it out, or will I work against the computer?




So 1 sensor on front right and 1 on center of differential.
How da heck that thing levels itself?




To top it, suppose MB allows 20mm difference in W211 corners level.
20mm=3/4". Mine is 1/2"
Looks like something I will have to live with.
I have the same problem.I had rear self levelling,fitted a conversion kit but still have the problem.Front left higher then front right by 1 finger and rear right lower then rear left.I guess there is nothing wrong with your air springs.I'm thinking changing both front springs might solve the problem.Just fitted to new front shocks.
Bought the car a year ago,and it had different shocks on rear.Elecric on right ,normal on left.Fitted 2 new electric recently.I guess it was manufactured with different shocks,because I don't have that little plastic thing to hold cable on left side.What is on yours?
If I find solution for the tilt,I'll let you know
My rear suspension is about half an inch lower on rear passenger side than on rear driver side. I've look around today with soap and water, seems to me there is no leak is the hoses or anywhere. Anybody knows how to set or reset rear stabilising unit electronics ?
When I wake up every morning, the passenger rear side suspension is completely dropped. When I start the engine, it comes up in about 30 seconds.
Anyone has an idea what this can be ?
Thanks very much !
Last edited by Cubita 305; May 11, 2017 at 09:11 PM.
over the past couple days I've notice that the rear passenger side of my car is about 1/2 lower than driver side.. It became more obvious after I instated 22 inch wheels on the vehicle. wondering if any of you guys ever encounter the same problem or heard of it before ??? The car had lowering links before but it's back on the stock links now.. just figured I mention that incase it may have anything to do with it. Thanks in advance!!
Last edited by Cubita 305; May 11, 2017 at 09:10 PM.
Post your question again here and you may get more help: https://mbworld.org/forums/s-class-w221-74/
over the past couple days I've notice that the rear passenger side of my car is about 1/2 lower than driver side.. It became more obvious after I instated 22 inch wheels on the vehicle. wondering if any of you guys ever encounter the same problem or heard of it before ??? The car had lowering links before but it's back on the stock links now.. just figured I mention that incase it may have anything to do with it. Thanks in advance!!




