E550 Airmatic to Coilover conversion
I apologize if there is another thread here with info on this topic, as i have not been able to find any information on this conversion for our model cars.
Thanks
There are not many E550's outside of warranty so you wont see many of those stories until the W212 is little older.
When that time comes it wont be cosmic, it will pretty much be exactly the same as the W211.
Anyway i guess i will be the test mule and call a few shops to see if anyone would be willing to take on the conversion for me... It seems like it would be a matter of ordering the standard hats and plugging off the OEM system attachments and programming out the module... Its not the main components that would be the issue for me, it would be the smaller parts that would easily be overlooked in the process. I guess i will take a look at a few of the more detailed W211 conversions to learn a little more...

You do realize that it wont spontaneously combust right?
You should just replace the engine and transmission while you are at it... you know those things wont last forever either.
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Last edited by ImInPA; Apr 29, 2014 at 01:12 PM.
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I apologize if there is another thread here with info on this topic, as i have not been able to find any information on this conversion for our model cars.
Thanks
Frankly, much of the carping about Airmatic is overblown. And, as someone else pointed out, the complex control systems in E class cars could make replacing Airmatic with a coilover system a real nightmare.
Airmatic was optional starting with the 2012 model year so if you want a V8 car but don't want Airmatic, look for a non-Airmatic 2012 E550.




Coilover conversions are very complex for the E-class, there are miles of wiring that has to be capped and/or removed. The ECU has to be recoded using a legit version of SDS run in developer mode to recode the ECU, the Cluster, the ABS, etc.
From what I recall, air suspension is optional on the E550, so you are better off finding one without airmatic from the get go.
Airmatic is nothing like the air suspension found in old Range Rovers. Airmatic is much more complex and reliable than most all air suspension systems offered by an OEM.
If a strut does fail, you can get a COMPLETE replacement from Arnott Industries with a LIFETIME warranty for $530! I know many people who have used these replacements and they are just as good if not better than the OEM ones.
Link:
https://www.arnottindustries.com/par...18_pid169.html
Anyway i guess i will be the test mule and call a few shops to see if anyone would be willing to take on the conversion for me... It seems like it would be a matter of ordering the standard hats and plugging off the OEM system attachments and programming out the module... Its not the main components that would be the issue for me, it would be the smaller parts that would easily be overlooked in the process. I guess i will take a look at a few of the more detailed W211 conversions to learn a little more...
Last edited by stale-bread; Apr 30, 2014 at 09:31 AM.
But i have tried many different shops and online search with no luck at all.
For some of MB cars, you will have to go with aftermarket Airlift. As i know those are way more stiff than our stock Airmatic.
Cost around 6K
Last edited by cocobeex; Oct 16, 2019 at 08:02 PM.
Thankfully I still have a good warranty for the next 1.2 years! still works perfect...
Cross fingers I did not jinx myself!




Super easy job to do. Took total of 5 hours and would be only around 3 hours on my second time.
Super easy job to do. Took total of 5 hours and would be only around 3 hours on my second time.




Valve block, that I really did not need, I got from MB dealer parts.
Valve block, that I really did not need, I got from MB dealer parts.
Valve block, that I really did not need, I got from MB dealer parts.
Alpha European Autotech
Purchase Amsoil at 25% off from me
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The problem with Arnotts is that they sometimes use Continental in some batches, and sometimes they do not. If they are stamped Continental they are as OEM close as possible.
The Continental logo is in the middle in yellow inside the gray square.
I don't know which Spanish company Arrie mentioned is also manufacturing them as well.
Edit: Monroe made the OEM ones when cars were made. Monroe is owned by Tenneco here in the US, and has a shock absorber factory in Spain.
Continental is the current OEM provider for MB.
Last edited by S. Madman; Oct 26, 2023 at 02:51 AM.







