Suspension
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Joined: Mar 2024
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2014 E550 4 Matic
Suspension
Hi I have a 2014 E550 4matic. I’ve been having problem with the suspension. The back end has been dropping down over night but only in sport and not in comfort mode. You can even push the rise button and it will stay up. I haven’t found any leaks and I’m starting to think it is the solenoid valve unit. It is letting the air go back and not shutting itself back off. I was wondering if anyone else has had this problem before? Thanks for anyone who might be able to help out
Out Of Control!!
Joined: Apr 2019
Posts: 11,919
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
Hi I have a 2014 E550 4matic. I’ve been having problem with the suspension. The back end has been dropping down over night but only in sport and not in comfort mode. You can even push the rise button and it will stay up. I haven’t found any leaks and I’m starting to think it is the solenoid valve unit. It is letting the air go back and not shutting itself back off. I was wondering if anyone else has had this problem before? Thanks for anyone who might be able to help out
The air valves are recognized to rust.
Unfortunately I am not an airmatic guy to guide you through testing and tips to keep the air dry.
MBWorld Fanatic!
Joined: Oct 2010
Posts: 5,141
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
It was leaking sir spring. My theory is that with comfort (or raised) setting the one good spring developed enough pressure when car lowered that it was able to carry the car without letting it go all the way down. Sports mode does not have enough stroke for this so car found bottom before enough pressure was present in the good spring.
Junior Member
Joined: May 2017
Posts: 16
Likes: 2
From: Toronto
2020 E63S & 2016 E550
I had this exact issue. With sports setting car went down but not in comfort.
It was leaking sir spring. My theory is that with comfort (or raised) setting the one good spring developed enough pressure when car lowered that it was able to carry the car without letting it go all the way down. Sports mode does not have enough stroke for this so car found bottom before enough pressure was present in the good spring.
It was leaking sir spring. My theory is that with comfort (or raised) setting the one good spring developed enough pressure when car lowered that it was able to carry the car without letting it go all the way down. Sports mode does not have enough stroke for this so car found bottom before enough pressure was present in the good spring.
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Joined: Apr 2021
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From: Scottsdale, Arizona
2001 E55AMG
It will be the corner closest to the ground with the least amount of wheel gap in the fender well...
Last edited by Highline-Autos.com; Mar 20, 2024 at 02:46 PM.
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MBWorld Fanatic!
Joined: Oct 2010
Posts: 5,141
Likes: 1,293
From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
The leaking spring was easy to see as that side was a little bit lower when in comfort mode and car did not go all the way down.
If it indeed is leaking spring replace them both. I bought Arnott springs.
For spring leak testing I built a kit with a hand ball valve that mounts between air supply tube and spring. After car is up and level and turned off I close the valve and then in the morning I can see if it went down.
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Senior Member
Joined: Sep 2019
Posts: 266
Likes: 305
2011 Mercedes E350 4Matic Wagon
Just for info, before getting new springs I replaced the valves but this $350 investment did not help any.
The leaking spring was easy to see as that side was a little bit lower when in comfort mode and car did not go all the way down.
If it indeed is leaking spring replace them both. I bought Arnott springs.
For spring leak testing I built a kit with a hand ball valve that mounts between air supply tube and spring. After car is up and level and turned off I close the valve and then in the morning I can see if it went down.
The leaking spring was easy to see as that side was a little bit lower when in comfort mode and car did not go all the way down.
If it indeed is leaking spring replace them both. I bought Arnott springs.
For spring leak testing I built a kit with a hand ball valve that mounts between air supply tube and spring. After car is up and level and turned off I close the valve and then in the morning I can see if it went down.
Had the same problem on my '11 S212 when it was around the 10 year 100k mark. The side with the more pronounced drop is usually the defective bag...in my case the it was the drivers side. I replaced both rear bags (imo replace both because of Murphy's law) with Arnotts and have been happy with them.
