S-Class (W223) 2021 to Present

Help needed about the noise from suspension

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Old Jul 30, 2024 | 12:53 PM
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S350d V223
Unhappy Help needed about the noise from suspension

I have been driving my S350d (v223) for nearly six months. Recently, I noticed an issue with the suspension when driving over slightly uneven roads or speed bumps. Interestingly, this problem only occurs after the car has been driven for at least 15-30 minutes, leading me to suspect that certain suspension components might be affected by heat.

I have taken the vehicle to the Mercedes-Benz dealership multiple times, but they have been unable to identify any issues. They attempted to replace some spring links, but the problem persists.

If anyone has experienced a similar issue, I have posted YouTube videos with the accompanying sound here. I would appreciate any insights or resolutions you could share. Thank you.





Last edited by Natesuke; Jul 30, 2024 at 01:04 PM.
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Old Jul 30, 2024 | 07:52 PM
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That’s not normal. I would just be insistent and share the videos with them.
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Old Jul 31, 2024 | 05:40 AM
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S350d V223
Originally Posted by Frenetic
That’s not normal. I would just be insistent and share the videos with them.
I shared the videos with them and attempted to do the same with other Mercedes-Benz dealerships. Unfortunately, they were unable to determine the root cause of the problem. They have replaced the front left air suspension, but the issue still persists.
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Old Aug 1, 2024 | 10:08 AM
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Not to let anyone off the hook, but it can be difficult to figure these out. Persistence is your only friend coming out the gate. I'm not sure whey they're reluctant to keep at these things, but they do seem that way, and not just at MB. In any event, you have little choice but to live with it, or go into squeaky wheel mode.
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Old Aug 1, 2024 | 10:32 AM
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Originally Posted by crabman
Not to let anyone off the hook, but it can be difficult to figure these out. Persistence is your only friend coming out the gate. I'm not sure whey they're reluctant to keep at these things, but they do seem that way, and not just at MB. In any event, you have little choice but to live with it, or go into squeaky wheel mode.
Ya sadly these are not something that throws a code to make pinpointing the issue easier. Noise issues are the most annoying imho.
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Old Aug 1, 2024 | 11:00 PM
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Originally Posted by Natesuke
I shared the videos with them and attempted to do the same with other Mercedes-Benz dealerships. Unfortunately, they were unable to determine the root cause of the problem. They have replaced the front left air suspension, but the issue still persists.
Makes you wonder what the service departments would be doing about this problem if it was an S63 or a Maybach S680.
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Old Aug 2, 2024 | 03:33 AM
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S350d V223
Originally Posted by W205C43PFL
Ya sadly these are not something that throws a code to make pinpointing the issue easier. Noise issues are the most annoying imho.
As you mentioned, it is quite frustrating. This issue tends to occur particularly after driving for a while, more than 15 minutes per se, or when certain suspension components become warmed up.
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Old Aug 2, 2024 | 08:56 AM
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Originally Posted by Natesuke
As you mentioned, it is quite frustrating. This issue tends to occur particularly after driving for a while, more than 15 minutes per se, or when certain suspension components become warmed up.
I see, you mentioned they replaced the left, but what about the right? Or is the sound coming from the left, in a clear audible way?

Did they use chassis ears to try to assist in determining the issue?
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Old Aug 3, 2024 | 01:56 AM
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S350d V223
Originally Posted by W205C43PFL
I see, you mentioned they replaced the left, but what about the right? Or is the sound coming from the left, in a clear audible way?

Did they use chassis ears to try to assist in determining the issue?
The sound originally came from both sides (as the technician told me), but the left was more noisy than the right. They installed some special equipment per MB‘s instruction though to record the noise, and sent it to MB for warranty‘s claim approval.

When I picked-up the car from the dealer, the technician told me that if the problem persists, I might need to come back to replace the right airmatic absorber, because MB did not approve for both sides to be claimed at the same time. The technician was told that the car was too new for such claims.

To be honest don‘t they have a better way to find out the root cause?
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Old Aug 3, 2024 | 08:48 AM
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Originally Posted by Natesuke
The sound originally came from both sides (as the technician told me), but the left was more noisy than the right. They installed some special equipment per MB‘s instruction though to record the noise, and sent it to MB for warranty‘s claim approval.

When I picked-up the car from the dealer, the technician told me that if the problem persists, I might need to come back to replace the right airmatic absorber, because MB did not approve for both sides to be claimed at the same time. The technician was told that the car was too new for such claims.

To be honest don‘t they have a better way to find out the root cause?
Sounds like they did use chassis ears then and didn't help a lot.
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Old Nov 18, 2024 | 10:57 PM
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S350d V223
Update Nov-24: After two months of leaving my car with the Mercedes Benz technician (following the dealer's technician giving up on the case), my entire suspension system has been thoroughly checked. The case was subsequently referred to a Mercedes technician in Germany for further consultation.

I was informed that there is a known defect in the front lower control arms module, which expands when warmed. Despite replacing the module with new parts, the noise persists. I have been advised that updated parts will be manufactured in Germany and will be ready for replacement by February 2025. In the meantime, I have been asked to take back the car and continue using it, as there are no safety concerns, only the issue of noise.

I was wondering if anyone else has experienced this issue or is aware of such a defect.
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Old Nov 19, 2024 | 03:35 PM
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Wow...
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Old Nov 20, 2024 | 12:27 PM
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Originally Posted by Natesuke
Update Nov-24: After two months of leaving my car with the Mercedes Benz technician (following the dealer's technician giving up on the case), my entire suspension system has been thoroughly checked. The case was subsequently referred to a Mercedes technician in Germany for further consultation.

I was informed that there is a known defect in the front lower control arms module, which expands when warmed. Despite replacing the module with new parts, the noise persists. I have been advised that updated parts will be manufactured in Germany and will be ready for replacement by February 2025. In the meantime, I have been asked to take back the car and continue using it, as there are no safety concerns, only the issue of noise.

I was wondering if anyone else has experienced this issue or is aware of such a defect.
Years ago A4's had a similar problem with the control arm bushings. I can remember after completing a track session with mine the bushings squeaking to beat the band. After they cooled off they wouldn't make any noise.
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Old Nov 21, 2024 | 10:31 AM
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Old Mar 28, 2025 | 09:43 PM
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Originally Posted by Natesuke
I have been driving my S350d (v223) for nearly six months. Recently, I noticed an issue with the suspension when driving over slightly uneven roads or speed bumps. Interestingly, this problem only occurs after the car has been driven for at least 15-30 minutes, leading me to suspect that certain suspension components might be affected by heat.

I have taken the vehicle to the Mercedes-Benz dealership multiple times, but they have been unable to identify any issues. They attempted to replace some spring links, but the problem persists.

If anyone has experienced a similar issue, I have posted YouTube videos with the accompanying sound here. I would appreciate any insights or resolutions you could share. Thank you.

Video1 - Outside the car

Video2 - Inside the car
i have same problem for my w223 my car under warranty the sond coming as same you after 15 to 20 minutes i have been go and come to dealer to fix the problem the charge every thing in suspension but still the sound not going after many discussions and the factory tray to fix the problems and there is many car have the problem the discover the issue is the lower bushes make squeezing still my car not fixed the factory now develop ne bushes and i am waiting to be released and have them my car only 10000km on odo

Last edited by QAT20002; Mar 28, 2025 at 09:54 PM.
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Old Mar 28, 2025 | 09:54 PM
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Originally Posted by Natesuke
I have been driving my S350d (v223) for nearly six months. Recently, I noticed an issue with the suspension when driving over slightly uneven roads or speed bumps. Interestingly, this problem only occurs after the car has been driven for at least 15-30 minutes, leading me to suspect that certain suspension components might be affected by heat.

I have taken the vehicle to the Mercedes-Benz dealership multiple times, but they have been unable to identify any issues. They attempted to replace some spring links, but the problem persists.

If anyone has experienced a similar issue, I have posted YouTube videos with the accompanying sound here. I would appreciate any insights or resolutions you could share. Thank you.

Video1 - Outside the car

Video2 - Inside the car
i have same problem for my w223 my car under warranty the sond coming as same you after 15 to 20 minutes i have been go and come to dealer to fix the problem the charge every thing in suspension but still the sound not going after many discussions and the factory tray to fix the problems and there is many car have the problem the discover the issue is the lower bushes make squeezing still my car not fixed the factory now develop ne bushes and i am waiting to be released and have them my car only 10000km on odo
​​​​​​​
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Old Mar 30, 2025 | 11:19 AM
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Originally Posted by Natesuke
As you mentioned, it is quite frustrating. This issue tends to occur particularly after driving for a while, more than 15 minutes per se, or when certain suspension components become warmed up.
I had a !998 A4 quattro that I tracked a couple of times. After a session on the track, the suspension would squeak and would go away after cool down. It was a known issue with the control arm bushings.

In a similar situation trying to get a suspension noise diagnosed on our KIA Niro EV. As far dealership diagnosis (or lack thereof), in the case of our Kia I was told that Kia does not pay for diagnosis time unless the repair is made. So you can imagine that the tech's are looking for a quick kill and disincentivised to spend a lot of time searching for what is really wrong.

Last edited by MBNUT1; Mar 30, 2025 at 11:25 AM.
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Old Apr 24, 2025 | 05:31 AM
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Originally Posted by QAT20002
i have same problem for my w223 my car under warranty the sond coming as same you after 15 to 20 minutes i have been go and come to dealer to fix the problem the charge every thing in suspension but still the sound not going after many discussions and the factory tray to fix the problems and there is many car have the problem the discover the issue is the lower bushes make squeezing still my car not fixed the factory now develop ne bushes and i am waiting to be released and have them my car only 10000km on odo
​​​​​​​
Sorry to hear you're dealing with the same issue. I was told the new bushing would be available by March 2025, but there haven't been any updates so far. There are rumors that Mercedes-Benz is testing it on the road, but no one seems to know when it'll actually be used in production. It's really frustrating to deal with this annoying noise, especially in a car at this price point.
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Old Apr 24, 2025 | 07:15 AM
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I have literally the same issue on my s580 maybach s equipped with Airmatic.
This always happens when the car gets hot.
How did you get it fixed? This sound is so annoying.
Thanks.
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Old Apr 24, 2025 | 12:33 PM
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CONTROL ARM BUSHINGS!!! HAVE THEM REPLACED!!!
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Old Apr 24, 2025 | 05:09 PM
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Originally Posted by DonS550
CONTROL ARM BUSHINGS!!! HAVE THEM REPLACED!!!
Bad already? Premature but I guess it could be defective from factory and progressively got worse.
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Old Apr 25, 2025 | 08:02 AM
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If you’ve driven in any high water or dirty water or after snowfall (where salt and grit can get into these areas), it doesn’t matter how long you’ve had the car.

Last edited by DonS550; Apr 25, 2025 at 09:17 AM.
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Old Apr 25, 2025 | 09:12 AM
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Originally Posted by DonS550
If you’ve driven in any high water or dirty water or after snowfall (where salt and grit can get into these areas, it doesn’t matter how long you’ve had the car.
I see. I live in the salt belt and in Canada.
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Old May 28, 2025 | 03:00 AM
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Same problem

Hi all!

I have the same problem with my w223 and no one can fix it ......
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Old May 28, 2025 | 09:24 AM
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If this is an inherent design issue with the suspension component, then why aren't we seeing the same issue on all cars?
If it's just a lower percentage of defective parts then why can't they fix it?
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