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Hopefully I'll find here some solution or advices. I recently purchased a 2022 E53 AMG model. The car has already been to 3 different brand service centers / dealerships with the same problem in the past 2 months. The issue is that there is a metallic rattling noise in the engine compartment, especially after cold starts, for about 1-2 minutes. I have made a video of this, which is available at the following link:
None of the service centers have effectively addressed the issue, as if it doesn't even exist. Nothing to do under warranty... The noise is practically easy to localize; either the wastegate actuator rod and/or the wastegate itself is rattling, right from new. I was stupid when didn't checked everything on the purchase. We sat in the car with running engine and the noise cannot be heared inside. The next week I brought back the car to the original dealership, and they said it's by design. (Like a ****ty lawnmover). I don't believe that such a noise is normal for a premium category car. Is this a common issue, or can it be fixed? The car has been in use for 2 months and has barely reached 2000 km. I have received no response from any of the 3 services since the car has been in service for the past 4 weeks. I've made complaints directly to Mercedes customer care, and they trying to categorize my issue again as a normal condition based on the same video I've uploaded here without any physical inspection or new appointment.... So the story hasn't been ended yet. Very disappointing from Mercedes. Had anybody the same issue and got it fixed somehow?
OP, did you tried pushing on things to see if the noise volume or frequency changes?
Yes, if I pull the wastegate actuator rod upwards or push downwards relatively hard the noise totally disappears. So the rod joints are loose there is a quite high clearance or the flipper inside vibrating next to the housing.
The dealership trying to explain its total normal, and it's the sound how high pressue injection works... Do I look like a fool.
I dont know if I show them would they blame me violaton the warranty with removing the plastc engine cover or something...
Yes, if I pull the wastegate actuator rod upwards or push downwards relatively hard the noise totally disappears. So the rod joints are loose there is a quite high clearance or the flipper inside vibrating next to the housing.
The dealership trying to explain its total normal, and it's the sound how high pressue injection works... Do I look like a fool.
I dont know if I show them would they blame me violaton the warranty with removing the plastc engine cover or something...
No that is NOT normal, they are ridiculous, tell them to show you another E 53 that does this. They wouldn't find any.
Update: After visiting the 4th dealearship including the original one, and after 2 official MB complaint involving a lawyer MB and the dealers stating it's totally normal. They could replace the turbo including the wastegate rod, but in this case warranty is not covering this, because there are no turbo pressure issues.
Finally the passenger side door panels (both front and rear) started rattling and producing crappy noise as well alongside the dashboard (summer is here). The car ran almost 3000km only. This model is an expensive garbage. I'll never buy new AMG again from the newer models, will return back to 2nd generation CLS and maintain it well...
Update: After visiting the 4th dealearship including the original one, and after 2 official MB complaint involving a lawyer MB and the dealers stating it's totally normal. They could replace the turbo including the wastegate rod, but in this case warranty is not covering this, because there are no turbo pressure issues.
Finally the passenger side door panels (both front and rear) started rattling and producing crappy noise as well alongside the dashboard (summer is here). The car ran almost 3000km only. This model is an expensive garbage. I'll never buy new AMG again from the newer models, will return back to 2nd generation CLS and maintain it well...
no it is not, I am so sorry to hear about that OP how they are brushing you off like that! They are absolutely ridiculous! I have two friends that have E 53 and CLS 53 respectively and they don't have this issue. I also have many friends with the facelift E 450 with the M256 also don't have this issue.
Not even saying it is a high calibre Benz, because not even an economy car makes noises like this.
Update: After visiting the 4th dealearship including the original one, and after 2 official MB complaint involving a lawyer MB and the dealers stating it's totally normal. They could replace the turbo including the wastegate rod, but in this case warranty is not covering this, because there are no turbo pressure issues.
Finally the passenger side door panels (both front and rear) started rattling and producing crappy noise as well alongside the dashboard (summer is here). The car ran almost 3000km only. This model is an expensive garbage. I'll never buy new AMG again from the newer models, will return back to 2nd generation CLS and maintain it well...
if there were a CEL because of a wastegate stuck... it would be a stored code and they would have to consider warranty replacement 😉
for your sake I hope this noise that is well documented is indicative of a pending mechanical failure
Last edited by PeterUbers; May 24, 2024 at 02:15 PM.
Finally I made a temporary fix, as for the noise. After the warranty is over I'll get it fixed permanently (if I'll even keep this noisy ****box). The spring tightens the rod, but let it move, hopefully it will be good for a while.
Unfortunatley neither of the dealerships in Hungary bothers themselves with this problem, I took my car to each of them in the past 4 months.
(I don't have any idea how to make corresponding CEL, which cannot be "recognized")
Also, when you hear the ticking, is it on the driver side or passenger side?
Originally Posted by tiborjan
Finally I made a temporary fix, as for the noise. After the warranty is over I'll get it fixed permanently (if I'll even keep this noisy ****box). The spring tightens the rod, but let it move, hopefully it will be good for a while.
Unfortunatley neither of the dealerships in Hungary bothers themselves with this problem, I took my car to each of them in the past 4 months.
(I don't have any idea how to make corresponding CEL, which cannot be "recognized")
I have this EXACT same issue! I guessed wastegate and glad it's not anything ICE related. My E53 is still under warranty until August 2026 so let me know what key words you mentioned if you happened to get it covered under warranty.
Well, I brought this problem up with MB and they changed the turbo under warranty. The new turbo does the same thing and they told me because the new turbo does the same, it must be designed as such. I think from my understanding of the engine that the supercharger always spins so it is sending pressured air to the turbo however it's more than what the turbo waste gate closure can handle, so it rattles. My issue is the this rattling is going to cause excessive wear inside the turbo on the waster gate closure over time. It's like a faulty turbo waster gate related issue that you can find on Youtube, which requires a new waste gate but since you can't just change this, you have to change the full turbo.
Well, I brought this problem up with MB and they changed the turbo under warranty. The new turbo does the same thing and they told me because the new turbo does the same, it must be designed as such. I think from my understanding of the engine that the supercharger always spins so it is sending pressured air to the turbo however it's more than what the turbo waste gate closure can handle, so it rattles. My issue is the this rattling is going to cause excessive wear inside the turbo on the waster gate closure over time. It's like a faulty turbo waster gate related issue that you can find on Youtube, which requires a new waste gate but since you can't just change this, you have to change the full turbo.
Well, my new turbo does the exact same.
So you are saying that to change the wastegate it is impossible?Because of actuator you have to change hole turbo?
Hello everyone, I have the same issue with my 2021 E450 coupe. Can you tell me what you guys did or how to handle this issue with mercedes. I have an appointment in 2 days with them about this metal rattle noise in cold start. I would appreciate any input.
I have a video in my thread: 2021 E450 coupe engine rattling in cold start only. - MBWorld.org Forums
Hello everyone, I have the same issue with my 2021 E450 coupe. Can you tell me what you guys did or how to handle this issue with mercedes. I have an appointment in 2 days with them about this metal rattle noise in cold start. I would appreciate any input.
I have a video in my thread: 2021 E450 coupe engine rattling in cold start only. - MBWorld.org Forums
Either a turbo replacement or the DIY method mentioned a few posts back.
My car is still under the warranty. Are they (Mercedes) going to replace turbo based on this noise or it will be a long fight?
First things first, you need to convince the dealership the noise is not normal, that is actually pretty difficult as there are quite a bit of M256 vehicles that have this noise. They will usually compare a vehicle on their lot, if it makes the same noise they will claim it is normal, even if it isn't.
got it thanks. Is it ok if keep driving like this? FYI car has 20k miles.
I do recommend getting it checked out by a dealership regardless, in case your dealership is willing to help solve it. Your mileage may vary though. The only reason why you want to stop driving a car is if there is a check engine light, especially a flashing one. Then have it towed immediately. In this particular case, it is a sound that even dealerships deem it is normal, so there is that.
Reason why I want you to get it checked out so you can have it in writing they claim it is normal so if, I mean if, there is engine damage caused by this in the future, they can't blame you and deny warranty because you just listened to the dealership which they claim is normal. So, in short, get the vehicle checked out.
got it thanks. Is it ok if keep driving like this? FYI car has 20k miles.
have had my CLS450 with the same M256 engine for years, and yes at cold start there is this metal clinking sound due to the electronic actuator arm.
it is not an issue with the turbo nor the engine, and it is because the actuator arm is slightly loose at cold start, there is no pulling tension keeping the internal gate close (and again it seems normal).
Once the engine is warmed up, the electronic actuator is pulled shut and with the tension the sound goes away.
I tried tightening it before to see what happens, and i would advise against it as it may throw a fault code if tightened too much. as the M256 uses the electronic version now, the mechanism checks the amount of tension and has an ideal range when in boost. If it sense that there is too much tension it will throw a CEL.
In another incident, It happened to me when i had my stainless steel oil line came in contact with the rod as well and caused some friction, this presented as additional tension in the reading.
Hope this is helpful information to those on the M256.
Cheers.
have had my CLS450 with the same M256 engine for years, and yes at cold start there is this metal clinking sound due to the electronic actuator arm.
it is not an issue with the turbo nor the engine, and it is because the actuator arm is slightly loose at cold start, there is no pulling tension keeping the internal gate close (and again it seems normal).
Once the engine is warmed up, the electronic actuator is pulled shut and with the tension the sound goes away.
I tried tightening it before to see what happens, and i would advise against it as it may throw a fault code if tightened too much. as the M256 uses the electronic version now, the mechanism checks the amount of tension and has an ideal range when in boost. If it sense that there is too much tension it will throw a CEL.
In another incident, It happened to me when i had my stainless steel oil line came in contact with the rod as well and caused some friction, this presented as additional tension in the reading.
Hope this is helpful information to those on the M256.
Cheers.
That is good news, any chance of dampening it a little?
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2022 E53 cold start rattling
