Coilover conversion SWAY / Torsion Bars DY
bad you din't make some pictures
mine is standing in the garage since 3 years
gonna fit it today !
Not a lot of suspension travel with the car on jack stands. I’ll be sitting it on the ground tomorrow after replacing the flex disk an heat exchanger pump. Suspension install is complete with front and rear sway bars installed.
I saw a $30 flex disc on eBay and said **** it, I can easily swap it out if it goes bad
well less than two weeks later the flex disc developed a huge crack through the middle, very unsafe
replaced with Febi brand and all is good
The Best of Mercedes & AMG
the main feeling of instability/bounce for example, is most present I would say above 40 mph, over substantial “waves” or dips in the road
there’s a bridge by me in the Tampa, Florida area that is notorious for being very “wavy”, all cars can visibly be seen bouncing up and down as you traverse the bridge. The bridge is called the bayside bridge. Local government is very upset with how bouncy the Ride is on the bridge, given the cost. Over and over again the road has smooth dips and small hills over the bridge pylons. Almost as if the bridge “settled” in the short spans between the support beams
certain cars can absorb these waves no problem, not many sports cars (stiff springs) can handle the waves very well. Larger vehicles such as trucks with leaf spring setups can fly over the waves with almost no bouncing at all.
with abc and the strutmasters kit, going over the bayside bridge was normal. But when I installed the yellowspeed kit, dips and bumps are much less forgiving.. at a certain speed, it can almost feel like the rear of the car wants to lift off the ground!
tried a bunch of settings, and some different springs but no luck.
hopefully the front and rear sway bars you’ve installed can actually get this kit into “acceptable” territory. It would be good news
the main feeling of instability/bounce for example, is most present I would say above 40 mph, over substantial “waves” or dips in the road
there’s a bridge by me in the Tampa, Florida area that is notorious for being very “wavy”, all cars can visibly be seen bouncing up and down as you traverse the bridge. The bridge is called the bayside bridge. Local government is very upset with how bouncy the Ride is on the bridge, given the cost. Over and over again the road has smooth dips and small hills over the bridge pylons. Almost as if the bridge “settled” in the short spans between the support beams
certain cars can absorb these waves no problem, not many sports cars (stiff springs) can handle the waves very well. Larger vehicles such as trucks with leaf spring setups can fly over the waves with almost no bouncing at all.
with abc and the strutmasters kit, going over the bayside bridge was normal. But when I installed the yellowspeed kit, dips and bumps are much less forgiving.. at a certain speed, it can almost feel like the rear of the car wants to lift off the ground!
tried a bunch of settings, and some different springs but no luck.
hopefully the front and rear sway bars you’ve installed can actually get this kit into “acceptable” territory. It would be good news
I have been driving without torsion bars for a while with Yellow coil-over suspension
it was ok, not bad at all, but I wanted to make it better
THIS IS FOR A 2003 CL600
I am saying this because on my subframe, I had the place to bolt on the torsion bar ready on my subframe
all you need is to remove the ABC crap on those two locations and you can bolt on the fantastic sway bar from a W220
The ride will be 95% as good as ABC
here pictures and part list
good luck
Control Arms left and right
A2203308907
A2203309007
many aftermarket company's make these, don't be silly and buy them from mercedes
second hand complete torsion bar
A2203232565
Bushing Brackets x2 (and you need the two bolts)
A2203230040
result:
remarks:
don't forget to buy the two bolts and nuts
it looks difficult to get behind the subframe to hold the nuts but it isn't
your fingers will go there
buy the sway bar second hand from ebay
hundreds there !
Also, the replacement lower arms have the lower end of the springs connecting more outside, that increases the firmness of the coil-overs !
update
After a 2 years experiencing, you must add this mod to make it perfect:
new control arms mod
you won't regret this !
Read my posts before you go into the wrong direction with DAS / Xentry Diagnostics
__________________________________________________ ___________________________
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i have recently replaced my control arms with those for a CL500, but instead, tomorrow I’m replacing with s600 control arms so that I can later one day install a front sway bar to see if that helps the ride any
Also trying to track down a “pop” noise from the front subframe/suspension area, perhaps like you mention in this post. I thought it would go away with new lower control arms, no luck. There is no play in the front suspension except a very minor bit of slack coming from what seems like the strut assembly. Tomorrow I am changing the upper control arms when I change the lowers to s600 arms hopefully that will help
I thought I would find loose/broken subframe mounting bolts in the front but all seems ok. Otherwise I have not been able to definitively track down this noise. Seems to be getting worse. I’ve heard of this issue being attributed to brakes but idk. I re-torqued the 4 front subframe bolts and the engine mount bolts. We will see if that helped tomorrow when I test the new parts
edit:that worked! Turning the 4 subframe bolts and the two motor mount lower bolts resolved my odd suspension noises, car may even feel a bit tighter now but I partially attribute that to the new upper control arms in the front
I was already insulted going out in the morning and seeing the damn thing laying frame because of the hydraulic fluid leaks. Oh but the precious ABC you say? I got sick of rebuilding the valve block with new seals and getting covered in hydraulic fluid. I was eventually successful in getting the rear to stop leaking but the front plagued me so that was enough of that. I don't have a lift to work on my cars so it was always me fighting with several liters of hydraulic fluid that I would always end up covered in, resulting in me being sick for 36 hours.
All that nonsense aside, I would like to track down the noise because it seems strange that the car could have that much noise coming from the suspension yet still remain stable at 140mph. So this weekend, when changing my oil, I will check my nuts to see how tight they are.
Last edited by paste; Mar 25, 2023 at 01:07 AM.


I chased this issue for months (long after coilover conversion) until I had someone stand outside the car and watch/listen as I rolled by.
I will have to get underneath the car and check the brakes anyway. They make noise and I have been thinking it was due to the fact I changed pads and discs a few months back, but I did not lubricate the pins that hold the pads. I'm not quite sure if it will be the source of the noise, should the calipers be loose as I don't believe they are loose at the moment. I do not experience any shaking or vibration while braking, even while doing so aggressively at freeway speeds.




Car has a front sway bar but the owner wants a rear. Are there any special instructions on how to install a rear, or can I just grab an S430 rear sway bar and drop links from the wrecking yard? This is an upgrade on a budget per his request at my garage.
Car has a front sway bar but the owner wants a rear. Are there any special instructions on how to install a rear, or can I just grab an S430 rear sway bar and drop links from the wrecking yard? This is an upgrade on a budget per his request at my garage.
I replaced the thrust arms on the front and most of the noise is now gone. I suspect the upper control arms need replacing and I could use new sway bar end links, but depending on what state the bushings are in, it definitely can translate into noise.




My 2004 CL55's ABC has been maintained and is riding GREAT but the grass is always greener.
What are these "$3500-$10000" options that have been mentioned in this thread?
I've reached out to KW and they are willing to create a custom kit for my car but it requires customer supplied measurements, and hours of R&D and while I dont necessarily have an issue with going through the process, Im more worried about getting something wrong on my end and the final product not being satisfactory.
If there are any performance oriented options, I'd be all ears.
I figure its easier to remove all the ABC while its still working and at least get a couple bucks for it vs tossing it in the bin when something fails.
Open to options!
My 2004 CL55's ABC has been maintained and is riding GREAT but the grass is always greener.
What are these "$3500-$10000" options that have been mentioned in this thread?
I've reached out to KW and they are willing to create a custom kit for my car but it requires customer supplied measurements, and hours of R&D and while I dont necessarily have an issue with going through the process, Im more worried about getting something wrong on my end and the final product not being satisfactory.
If there are any performance oriented options, I'd be all ears.
I figure its easier to remove all the ABC while its still working and at least get a couple bucks for it vs tossing it in the bin when something fails.
Open to options!
A lot of the SL guys seem to be happy running a coilover set from VVK, who now make a set for the CL and S-Class. These weren't available when I did my conversion otherwise I would have bought them.




A lot of the SL guys seem to be happy running a coilover set from VVK, who now make a set for the CL and S-Class. These weren't available when I did my conversion otherwise I would have bought them.
If I ever got the chance to, I would love an opportunity to ride in someone's car who has used the VVK setup. I'll probably just add my w220 to the growing list of cars that I wish I never got rid of.




If I ever got the chance to, I would love an opportunity to ride in someone's car who has used the VVK setup. I'll probably just add my w220 to the growing list of cars that I wish I never got rid of.
Its likely the way to go as the older these cars get, the more difficult they will be to keep on the road.
Took me too long to find a used door lock actuator that actually worked. Parts like that, not being available, will make these cars undriveable shortly.



