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C63AMG W205 Juddering and Jerky under Acceleration

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Old Jun 10, 2021 | 10:39 AM
  #126  
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Originally Posted by mmich22
I have lost so much respect for Mercedes and the dealer. They have horrible communication, only via text. Has anyone tried Lemon Law?
I have heard of the Lemon Law, we have something similar here in the UK. And i know what you mean about the message customer services. What a joke!!
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Old Jun 10, 2021 | 10:40 AM
  #127  
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Originally Posted by Akl1234
I am working with Euro Motorcars Bethesda Md(USA) they are I think considered best MB dealer in the US
Not local to the UK then lol
All dealers say they are the best when there is nothing to fix, as soon as you get a problem then thats a different matter!
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Old Jun 10, 2021 | 05:57 PM
  #128  
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I’m convinced it’s a simple sensor that is misbehaving when it heats up. Without a code who knows where it is.

Soooooooo annoying, kept it mint for 5 years and have to get rid because no one can fix it. Also, can’t believe it’s not missed a beat for its first 4.5 years and 18,000 miles. I’ve only noticed it for the last 6 months. Not like it’s been crap since new.

Only protection you have in the UK is if you are under warranty (MB std 3 years) or lease it and then you can hand it back if you can prove it’s a lemon and unfit for purpose. Or group claim!
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Old Jun 15, 2021 | 04:50 AM
  #129  
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Any update on your vehicles guys? Mines gone back into MB today, I’ve told them i don’t want it back until they have a cure otherwise its being refunded back 😢
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Old Jun 15, 2021 | 08:44 AM
  #130  
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Hi guys, my first post here (after the introduction), I am experiencing similar issue on my C63 (non-S) SW.
However, this is not happening all the time, in Comfort or Sport mode I can feel the non-linear acceleration, but in Sport+ mode, I usually don't have it...

I will bring my car for service next week, and I will mention this to them, I will see what they say (and do)!
I am located in France btw.
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Old Jun 15, 2021 | 08:56 AM
  #131  
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From: between France & Hong-Kong
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Old Jun 15, 2021 | 09:06 AM
  #132  
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Originally Posted by peb_35
Hi guys, my first post here (after the introduction), I am experiencing similar issue on my C63 (non-S) SW.
However, this is not happening all the time, in Comfort or Sport mode I can feel the non-linear acceleration, but in Sport+ mode, I usually don't have it...

I will bring my car for service next week, and I will mention this to them, I will see what they say (and do)!
I am located in France btw.
hi Pep_35, Welcome aboard! we all seem to be having the same issues. Hopefully one of our techs around the globe can come up with a solution, and quick!!

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Old Jun 15, 2021 | 09:24 AM
  #133  
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C63 AMG(W205) 17'
Hey Everyone! Update time.

advisor text me saying they were able to duplicate the issue and discovered my left engine mount was broken. They replaced it and I’m hoping to have car later today or tomorrow! I will of course do my testing but seems strange such a tiny piece like that could cause this?

anyone have any insight? From my limited mechanical knowledge it shouldn’t cause RPM hesitation?
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Old Jun 15, 2021 | 09:29 AM
  #134  
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Originally Posted by Akl1234
Hey Everyone! Update time.

advisor text me saying they were able to duplicate the issue and discovered my left engine mount was broken. They replaced it and I’m hoping to have car later today or tomorrow! I will of course do my testing but seems strange such a tiny piece like that could cause this?

anyone have any insight? From my limited mechanical knowledge it shouldn’t cause RPM hesitation?
Definitely cant see that causing the RPM issue, and when the vehicles engine temp is hot. Mine is in MB and they have said the data they will be taking off of it will be being sent over to the AMG techs in Germany.

I wouldn’t hold your breath on the mount but who knows with these cars!
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Old Jun 15, 2021 | 09:48 AM
  #135  
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C63 AMG(W205) 17'
Originally Posted by Mahoo2
Definitely cant see that causing the RPM issue, and when the vehicles engine temp is hot. Mine is in MB and they have said the data they will be taking off of it will be being sent over to the AMG techs in Germany.

I wouldn’t hold your breath on the mount but who knows with these cars!
yea. I’ll be doing my testing once I get her back lol! But maybe some sensor limits RPM if it detects engine mount is unstable? And apparently “engine mount” can include tranny mount and other components so possible?

I’ll keep y’all posted though!
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Old Jun 15, 2021 | 10:02 AM
  #136  
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Originally Posted by Akl1234
yea. I’ll be doing my testing once I get her back lol! But maybe some sensor limits RPM if it detects engine mount is unstable? And apparently “engine mount” can include tranny mount and other components so possible?

I’ll keep y’all posted though!
All fingers crossed for ya mate. Sure I’ve asked before but where abouts are you?
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Old Jun 15, 2021 | 11:22 AM
  #137  
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Originally Posted by Mahoo2
All fingers crossed for ya mate. Sure I’ve asked before but where abouts are you?
lol no worries. USA near Washington DC
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Old Jun 15, 2021 | 01:01 PM
  #138  
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Good luck!! I have the exact same issue. I called and spoke with Mercedes CAC yesterday and they are submitted for review for buy back. They said more than likely nothing will happen because the service advisor never put anything in the documents about having an issue. It's so frustrating. I recommend everyone call Mercedes CAC so it gets noted that we are all having the same issue, no matter where we live.
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Old Jun 15, 2021 | 05:18 PM
  #139  
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C63AMG W205 Coupe
The problem is there just aren’t enough people with this issue for Mercedes to listen to us. Even trusted high performance specialists are stumped, not just the main dealers. I’d be keen to know if all the these vehicles share any common traits like low mileage, type, age, Pre/after facelift etc.

Mine’s a UK coupe, June 2016, 20,000 miles since new

I have replaced or readapted every part that would make sense and some that didn’t, but are known weak points in the car. It drives even better than before……90% of the time.
I left the sensors to last as there are many, and in 2’s all the way down the car so that can get expensive quick.
We should all do a sensor lottery and take a pair each and see who gets it right.
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Old Jun 16, 2021 | 10:48 AM
  #140  
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[QUOTE=The1Monk;8354786]I’m convinced it’s a simple sensor that is misbehaving when it heats up. Without a code who knows where it is.

Soooooooo annoying, kept it mint for 5 years and have to get rid because no one can fix it. Also, can’t believe it’s not missed a beat for its first 4.5 years and 18,000 miles. I’ve only noticed it for the last 6 months. Not like it’s been crap since new.

Only protection you have in the UK is if you are under warranty (MB std 3 years) or lease it and then you can hand it back if you can prove it’s a lemon and unfit for purpose. Or group claim![/QUOTE
Afternoon from the UK
was it you who said that when you use it in manual the problem doesn’t arise? If not does it?
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Old Jun 16, 2021 | 11:16 AM
  #141  
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Originally Posted by Akl1234
lol no worries. USA near Washington DC
Afternoon from the UK
​​​​​​​was it you who said that when you use it in manual the problem doesn’t arise? If not does it?
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Old Jun 16, 2021 | 02:43 PM
  #142  
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Think it was me. I find it easier to manipulate the juddering when in manual. The problem also seems to arise less often but still arises. This directed my attention towards the gearbox, however, MB tell me my gearbox is like brand new since adapting the clutch and regearing.
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Old Jun 16, 2021 | 03:03 PM
  #143  
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Originally Posted by The1Monk
Think it was me. I find it easier to manipulate the juddering when in manual. The problem also seems to arise less often but still arises. This directed my attention towards the gearbox, however, MB tell me my gearbox is like brand new since adapting the clutch and regearing.
MB tell you its like brand new, how do you find it though?
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Old Jun 16, 2021 | 05:07 PM
  #144  
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Great. Snaps between gears in sports, comfy and smooth in auto. Clutch engages as soon as you select drive rather than giving it some revs (a previous post stated high Revs of 2k required, mine was only 1,200 rpm and barely noticeable but now take off is instant as soon as D selected). It feels way better. So in conclusion this and the ignition coils have given it a new lease of life and it feels great.

As for the juddering it’s still there. Mostly on motorways when a combo of cruising and accelerating and braking brings it on. When it’s wet or driving on an incline it seems to be worse and when the car is hot it seems to go through cycles of bad behaviour every 15/20 mins often cleared with kickdown, it also clears on its own if ignored after a few minutes. Has been doing this since September last year and I’ve been investigating ever since.


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Old Jun 16, 2021 | 08:01 PM
  #145  
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Update from Dealer. engine mounts did nothing…obviously. They drove the car after replacing them and issue still was there. They took another data dump and sent it off to MB. Just hit one full week without the car. Signs of withdrawal are bad! Lol

seems wet clutch, coil packs are helping us?

my car is a 17 coupe, 50k miles(service was just done) does take a second to get into gear on cold start 1.5-2k revs. So starting to point to the clutch eh?

from what I read another post over at mbclub wet clutch was an issue in 2015 for a guy. They had his car for 6 weeks to investigate before agreeing to replace the wet clutch!! He didn’t say whether he had a w205 or 204 but seems like this may be the culprit as others suggested!

Last edited by Akl1234; Jun 16, 2021 at 08:30 PM.
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Old Jun 17, 2021 | 05:04 PM
  #146  
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If it can be re-adapted there is nothing wrong with it. Seems they just push the plates closer together with a software reset. They have to manipulate the system by telling it a major component was replaced. With regards to readapting the gearing - total waste of time made no difference.
MB told me that when the clutch goes it will slip, I’ve never had any of that when experiencing the juddering. Also from past experience if a clutch is done it slips all the time not just when warm and then goes away?
I’m looking at sensors and fuel pump as that’s all thats left.
As for all the parts I’ve replaced that have made it better (but not got rid of the juddering) at 20,000 miles, I think these cars have quite a few gremlins.
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Old Jun 17, 2021 | 06:54 PM
  #147  
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Originally Posted by The1Monk
If it can be re-adapted there is nothing wrong with it. Seems they just push the plates closer together with a software reset. They have to manipulate the system by telling it a major component was replaced. With regards to readapting the gearing - total waste of time made no difference.
MB told me that when the clutch goes it will slip, I’ve never had any of that when experiencing the juddering. Also from past experience if a clutch is done it slips all the time not just when warm and then goes away?
I’m looking at sensors and fuel pump as that’s all thats left.
As for all the parts I’ve replaced that have made it better (but not got rid of the juddering) at 20,000 miles, I think these cars have quite a few gremlins.
so. They called me and said MB discovered that my transmission has a aftermarket tune and that is what is causing the issue I am facing…… now I am in arguments with them about the fact that I never knew this when I bought the car from them and they cannot void my warranty based on that. They will be flashing stock tune and giving it a go after that. I sure as hell hope it was just that…. Still doesn’t add up though. You don’t just tune a transmission… lol
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Old Jun 18, 2021 | 02:31 AM
  #148  
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Originally Posted by Akl1234
so. They called me and said MB discovered that my transmission has a aftermarket tune and that is what is causing the issue I am facing…… now I am in arguments with them about the fact that I never knew this when I bought the car from them and they cannot void my warranty based on that. They will be flashing stock tune and giving it a go after that. I sure as hell hope it was just that…. Still doesn’t add up though. You don’t just tune a transmission… lol
wtf are they in about?? How are you supposed to know its past history?
Hopefully it is as something that simple, think they are clutching at straws to be honest!
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Old Jun 18, 2021 | 02:37 AM
  #149  
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Originally Posted by Akl1234
Update from Dealer. engine mounts did nothing…obviously. They drove the car after replacing them and issue still was there. They took another data dump and sent it off to MB. Just hit one full week without the car. Signs of withdrawal are bad! Lol

seems wet clutch, coil packs are helping us?

my car is a 17 coupe, 50k miles(service was just done) does take a second to get into gear on cold start 1.5-2k revs. So starting to point to the clutch eh?

from what I read another post over at mbclub wet clutch was an issue in 2015 for a guy. They had his car for 6 weeks to investigate before agreeing to replace the wet clutch!! He didn’t say whether he had a w205 or 204 but seems like this may be the culprit as others suggested!
From what i understand the W205 has a wet clutch and the W204 has a Torque Converter. The Wet clutch can apparently fail to respond to the Star computer for resetting thus require changing.
Mine is still in MB and I’m missing her badly, i even followed one in today just to hear the growl 😩

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Old Jun 22, 2021 | 08:08 PM
  #150  
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Is no news good news or have you traded your problem cars in? I’m still waiting for the report back from MB although I’m not holding my breath on a solution.
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