E-Class (W211) 2003-2009

Wagon rear coil spring conversion

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Old 11-30-2018, 10:57 AM
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Wagon rear coil spring conversion

Has anybody converted their wagon rear only air suspension to Arnott C2896 coil springs? If so, how does the ride and handling compare to the air springs? How does it deal with heavy loads? Do you have any pics of the ride height? I'm looking to convert my wagon to coil springs but I can't seem to find any info on this kit. Thank you
Old 11-30-2018, 02:00 PM
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1922 Ford Model T / no OBD
Don't think it is possible on wagons as loosing self-leveling will bring safety issues.
Does Arnott offers springs for wagon?
Than why would you delete nice suspension to go to harder springs? I sold wagon with air to get diesel, what forced me to hard-riding sedan. Frankly I missed the comfort.
Old 11-30-2018, 03:27 PM
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Originally Posted by kajtek1
Don't think it is possible on wagons as loosing self-leveling will bring safety issues.
Does Arnott offers springs for wagon?
Than why would you delete nice suspension to go to harder springs? I sold wagon with air to get diesel, what forced me to hard-riding sedan. Frankly I missed the comfort.
​​​​​​The wagon kit exists as evidenced by the PN, installation manual and multiple vendors that carry it. Im sure some people are already driving on it. I want to convert it because don't want to deal with airbag failure 500 miles from home in the middle of vacation. Reliability is far more important to me than a cushy ride for my rear seat passengers. I own 3 other wagons all with coil spring rear suspension.they all ride just fine. Is the Arnott kitt much worse than any other coil sprung wagon?
Old 11-30-2018, 04:34 PM
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1922 Ford Model T / no OBD
Are you talking about spring kits, or air bags kits?
The legal issues with the idea, besides illegal alerting factory body , you are going to have will be lights setting.
Without self-leveling headlights, when you load wagon rear springs - you are going to blind opposite drivers.
That can get you pulled over very fast.
I mean I have seen worse butchered cars on the roads, but you don't expect it on MB
Old 11-30-2018, 04:46 PM
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Originally Posted by kajtek1
Are you talking about spring kits, or air bags kits?
The legal issues with the idea, besides illegal alerting factory body , you are going to have will be lights setting.
Without self-leveling headlights, when you load wagon rear springs - you are going to blind opposite drivers.
That can get you pulled over very fast.
I mean I have seen worse butchered cars on the roads, but you don't expect it on MB
Are you just inventing pretend problems out of boredom?
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Old 11-30-2018, 07:02 PM
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1922 Ford Model T / no OBD
I am just getting tired about members coming with project ideas and "forgetting" to add
"I am aware that such thing is forbidden by law"
Old 11-30-2018, 09:33 PM
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Originally Posted by kajtek1
I am just getting tired about members coming with project ideas and "forgetting" to add
"I am aware that such thing is forbidden by law"
LOL
What law forbids coil springs?
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Old 07-21-2020, 01:59 AM
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2004 E500
I did the conversion

its not that different just slightly more NVH and 1 inch lower than air
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Old 07-21-2020, 02:11 AM
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Very good info and video, thanks. My rear airbag suspension is still working 18 months and 20k miles later but if it ever fails I'll be doing the same conversion as well.
Old 01-26-2022, 12:17 PM
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e350 4matic wagon 2009
Did you ever convert?

Originally Posted by tjts1
Very good info and video, thanks. My rear airbag suspension is still working 18 months and 20k miles later but if it ever fails I'll be doing the same conversion as well.
tjts1, I Just read your last post because I'm considering the conversion also. My driver's side airbag is gone, and I need to do something and I'm not sure which way to go. You've actually contributes to my recent post about it. Did you ever do the conversion? If not did you learn anything else about it that you could share? I found these 3 kits (below) which you probably know about and there are probably more which tells me this is a common problem or there wouldn't be a market for these.

https://www.strutmasters.com/product...sion-kit-mi2rb

https://www.fcpeuro.com/products/mer...20%231#fitment

https://www.suncoreindustries.com/pr...-rear-leveling


That one's super cheap and I'm not sure why but it's so cheap I'm suspicious of the quality.
Old 01-26-2022, 12:20 PM
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My rear air suspension has been totally reliable since starting this thread 3 years ago so I'm sticking with it. I also use the car for towing once in a while and its been useful for that as well. If it ever fails I'll probably just replace the airbags.
Old 01-26-2022, 12:24 PM
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e350 4matic wagon 2009
Doing the airbags sounds a little easier which is what I'll probably do. Afterall these have gone 122K and the car is 12.5 years old. What more can I ask from it.

Thanks.
Old 01-29-2022, 05:58 PM
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04 e320 wagon
I just had the conversion done on my 04 e320 4matic wagon. I went with the https://www.strutmasters.com/collect...sion-kit-mi2rb

The ride height is maybe slightly lower, it rides a bit harder. Haven't had any heavy loads in it since the conversion.

before




After


Old 02-02-2022, 11:30 AM
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06 E500 4Matic Wagon
Arnott springs sag in the rear. I had to modify a 3" spring spacer to level the rear out. I would suggest the BC Racing coilover kit for wagons as I will most likely go that route for adjustability.
Old 02-02-2022, 05:08 PM
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e350 4matic wagon 2009
Originally Posted by Onyxthecat
Arnott springs sag in the rear. I had to modify a 3" spring spacer to level the rear out. I would suggest the BC Racing coilover kit for wagons as I will most likely go that route for adjustability.
Are you referring to coil springs or airsprings when you say they sag?
Old 02-09-2022, 04:55 PM
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06 E500 4Matic Wagon
Coils
Old 02-12-2022, 09:39 PM
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'07 GL320CDI, '10 CL550
Yes, you lose automatic self leveling … which is useful for more than just headlights.

Conversion of Airmatic Mercedes to steel coil springing is a massively bad idea.

in Europe, cars with HID headlights are legally required to have automatically leveling headlights. (Washing too). In 3rd world countries like USA, nobody cares and there are lots of trailer park cars on the road.
Old 06-16-2024, 07:22 AM
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After 6 years of ownership my rear airbags finally started sagging over night. Against my better judgement I decided to try Arnott replacement air springs. 3 weeks later both Arnott air springs exploded on the freeway a few minutes apart. The second one exploded while the car was parked waiting for the tow truck.


After that experience I decided to go back to my original plan. I picked up a set of used 2006 E350 sedan (non sport) rear springs, spring spacers and lower control arms. $130 all in.


The spring spacers they came with (2113250584) are the thickest stock size with 4 disks in the middle. MB offers version of the spacer from 0-4 disks in the middle to adjust ride height.


The installation was relatively easy but the ride height was a bit too low. The springs were designed for the sedan which is lighter than the wagon so I ordered an additional spring spacer from the dealer and disassembled it into its individual components.

Split the spacer disks in half and added 2 disks to each side for a total of 6 per side.



Perfection


The ride quality with the coil springs is sublime, much better than the air springs. I should have done the coil spring conversion years ago just for the improved ride. Arnott air springs are garbage.

Last edited by tjts1; 06-16-2024 at 07:47 AM.
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Old 06-16-2024, 08:02 AM
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06 E500 4Matic Wagon
Crazy! I knew their products were bad but both exploding? Glad your ok and didn't get into an accident because of this. Are you filing a warranty claim? Also, good to see a more reliable way to get the rear figured out and I did the same with coilovers and E350 lower arms.
Old 06-16-2024, 08:40 AM
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Originally Posted by Onyxthecat
Crazy! I knew their products were bad but both exploding? Glad your ok and didn't get into an accident because of this. Are you filing a warranty claim? Also, good to see a more reliable way to get the rear figured out and I did the same with coilovers and E350 lower arms.
Yes I made a warranty claim and they quickly shipped out replacement air springs. Unfortunately the warranty only covers replacement not refund. I sold them off on FB and recovered most of my money.

When the first airbag failed I was going 80mph. The car was perfectly controllable and I was able to stop safely onto the shoulder. About 10 min later after I called AAA the second one exploded. I'm just happy it didn't happen while the tow truck driver was strapping down the car. There was no damage to the wheel or tire.

Both air springs failed where the rubber bag is crimped onto the top hat with a large steel ring. The steel ring holding the whole thing together came off.





I measured the steel ring on the failed and replacement air springs. The replacements were 0.8mm smaller. I suspect they didn't make the crimp tight enought and I ended up with a bad batch. The replacements are probably going to be more reliable. It's not worth the risk to me.

Last edited by tjts1; 06-16-2024 at 12:12 PM.
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Old 06-16-2024, 08:53 AM
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W212 E63S Wagon - GSL580 - E63 - E350 - C300
Damn, that is worse (maybe) than my CreativeSteel motor mounts....FAR less labor with those....
Old 06-16-2024, 08:59 AM
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06 E500 4Matic Wagon
What happened with those mounts?
Old 06-16-2024, 09:00 AM
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W212 E63S Wagon - GSL580 - E63 - E350 - C300

Originally Posted by Onyxthecat
What happened with those mounts?

Melted - there is a thread in the W212 AMG forum. Not even 500mi on em. As a note, OE are fine....were fine (replaced at 60k)

Last edited by OldManAndHisCar; 06-16-2024 at 09:01 AM.
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