C63 AMG anti-roll bars compatibility
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C-Class W205 C250d 4matic
C63 AMG anti-roll bars compatibility
Hello, I'm looking for an upgrade for the anti-roll bars on my C250d 4matic and since there aren't any aftermarket options available, I was wondering if I can use the set from a C63 AMG as a replacement. Does anyone knows if they would fit? Thanks.
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2019 C63CS
I don't know if they fit, but you likely have more luck with the ones form the C43 for a couple of reasons. The C43 has 4MATIC as well, so the front anti-roll bars don't interfere with the front differential, and the C43 has the same track width as the standard C Class models. The C63 sedan has a wider track in the front, and the coupe has a wider track both in the front and rear, so the anti-roll bars may be longer.
Having said that, taking the anti-roll bars from a C43 or C63 and putting them on your C250d isn't necessarily a good idea. The anti-roll bars have to be matched with the rest of the suspension, otherwise it may mess up the under/oversteer characteristics of the car. How stiff the rear is compared to the front has consequences on if the car understeers or oversteers. Both the C43 and C63 also have adaptive suspensions, so the anti-roll bars take that into consideration as they have to perform on a spectrum vs a fixed suspension that can't be adjusted.
What is it that you are trying to accomplish? Changing just one aspect of the suspension w/o matching the others is rarely a good approach.
Having said that, taking the anti-roll bars from a C43 or C63 and putting them on your C250d isn't necessarily a good idea. The anti-roll bars have to be matched with the rest of the suspension, otherwise it may mess up the under/oversteer characteristics of the car. How stiff the rear is compared to the front has consequences on if the car understeers or oversteers. Both the C43 and C63 also have adaptive suspensions, so the anti-roll bars take that into consideration as they have to perform on a spectrum vs a fixed suspension that can't be adjusted.
What is it that you are trying to accomplish? Changing just one aspect of the suspension w/o matching the others is rarely a good approach.
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C-Class W205 C250d 4matic
Thanks for the reply. I was trying to achieve less body roll when taking turns at higher speeds but I couldn’t find any aftermarket options. This being said, I think it’s best to just let it as it is since I don’t want to do any harm to my vehicle if I try to replace them with the parts from a C43, just like you mentioned.
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You might accomplish that with stiffer anti-roll bars from the C43, but as said, I don't know how that would play out with your suspension. The regular C Class models typically have what Mercedes calls selective damping suspension. It's a passive system that has two settings for the dampers and they switch between them passively without driver involvement. They are in the comfort setting when driving in a straight line and then switch to a more sporty setting based on how hard the car is cornering. Unfortunately as said, the driver can't manually choose between the settings, so yes at times it is soft during cornering when it should be more stiff. I never liked this suspension very much. It did improve in the W206, though. Some markets could also option AIRMATIC on some C Class models I believe and there is also an optional sport suspension, so do you know what specific suspension you have? If you have the comfort selective damping suspension, then one option is to upgrade it to the sport suspension. The sport suspension is slightly lowered, for a lower center of gravity and firmed up a bit.
Last edited by superswiss; Mar 15, 2026 at 11:59 AM.
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C-Class W205 C250d 4matic
I also thought about just replacing the shocks with the sport version, as my car does have the standard comfort suspension unfortunately. However I do have the Eibach lowered springs which makes a difference but if the road is not perfectly straight the car will tend to jump at relatively higher speeds. My cousin also have a W205 C-Class but with sport suspension from factory, and my car does sit a bit lower than hers with the aftermarket sport shocks that I have. The problem of replacing the shocks with the sport version is that the Mercedes dealerships refuse to do it if it's not equipped on the car from the factory, I already asked that on two different dealerships.
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Yeah, this is what I meant when I said changing one aspect of the suspension w/o matching the others isn't a good idea. Stiffer anti-roll bars aren't gonna fix your skipping/jumping suspension. You have a spring/damper mismatch. Your suspension is no longer damped properly, so the wheels bounce instead of staying planted. The primary job of a suspension is to keep the wheels in contact with the road at all times, so spring rates and damping has to work together to accomplish that. Your suspension as it is now is basically failing at its primary job. Look into getting coilovers to replace both springs and dampers with a proper setup.
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C-Class W205 C250d 4matic
The Eibach springs that I have are meant to be used with the standard dampers, that's why I installed them, otherwise I would have looked for other options. They are also sold as a package with some Bilstein sport dampers (I think it's Bilstein B6) but since they are not available all the time as they get out of stock and need to wait for another release I wouldn't buy the dampers kit.
Last edited by br4to92; Mar 16, 2026 at 04:09 AM. Reason: additional info
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2019 C63CS
I don't doubt that they are sold as such, but from your description, it doesn't sound like they make for a good suspension setup if your car jumps around. Are you sure they are meant to go with the comfort dampers, or are they meant to go with the sport dampers? Either way, the issue with lowering springs is always that they reduce the suspension travel that was designed into the car from the factory and because the car sits lower, the dampers are always partially compressed more than they are meant to be after the stock suspension has naturally settled.
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C-Class W205 C250d 4matic
I double checked with Eibach based on my car's VIN number, and they confirmed that the springs are indeed for my factory dampers. I always had the impression that the bouncing was because of the factory dampers, not the upgraded springs, but maybe it has something to do with the whole setup, just like you mentioned.
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2019 C63CS
It's the springs and the whole setup. Lowering springs have higher spring rates, because they are shorter, otherwise you'd bottom out. Those higher spring rates makes them stiffer, and the suspension gets bouncier and if it isn't compensated by matched damping, you just keep hoping around. Personally, I've yet to drive a car with aftermarket suspension that is actually good. For example, I once drove a C300 Coupe with aftermarket suspension. I don't know exactly what springs it had, but same thing. It was bouncing like a bunny. I drove it back to back with my '19 C63S Coupe on the same stretch of highway and the difference was night and day. While my C63 stays planted and corners flat w/o bouncing around, this C300 was uncomfortable. I was bouncing up and down in my seat for no good reason. I've always admired how the adaptative suspension in my C63 remains composed and settles quickly. Over a bump, it compresses once, then rebounds and then immediately settles, whereas this C300 never settled. By the time it would have settled, the next bump made it oscillate again. The damping and spring rates were just mismatched.
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C-Class W205 C250d 4matic
I only wish that my car had come with the factory sport suspension so everything would have been perfect. The original springs were so long that the car literally looked like a truck and it wouldn't make sense to have the AMG Line exterior package with big brakes and the comfort suspension. With the current setup I feel the car very unstable at speeds over 180km/h because it tends to bounce even at the smallest bump so I rarely hit it past that if the road is almost perfectly flat. Maybe I should try to find a way to put the factory sport dampers and see how the car will feel. I just need to find the correct part numbers and maybe I can try to order them myself and not have to worry about the dealership which already told me that they won't order anything else besides the ones which came installed from the factory.
