C63AMG W205 Juddering and Jerky under Acceleration
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Joined: Apr 2021
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C63AMG W205 Coupe
C63AMG W205 Juddering and Jerky under Acceleration
Hi All,
I'm new on this forum and am using it as a last attempt to save my 2016 C63AMG W205 coupe. Any help or advice will be greatly appreciated. 20,000 miles and owned since new. Fully serviced by MB under service plans.
I have throughly researched the net on my problem and no existing issue is sounding exactly the same.
My car judders under acceleration once it's warm and has been running for 15 minutes.
It's been into Mercedes twice and they cannot find a fault code so to them it isn't a problem. They have applied an update to the ECU but it still has the problem. Feels like it is being strangled, it judders and hesitates under acceleration. If I am very violent with the accelerator and get it to kick down multiple gears, i can get it to clear. It is fine on 100% throttle but anything below seems to cause hesitation/juddering and an uncomfortable ride when warmed up. Also I only ever used Shell Optimax 99 octane.
I have started to tick cheap things off the list;
Into Mercedes twice for diagnosis - couldn't find anything wrong or get the problem to re-occur. Software update applied.
New spark plugs (seemed better for a day then back to normal)
Re-set gearbox (needed doing but didn't fix the issue)
Into Independent garage that also couldn't recreate the fault but found an exhaust flap sensor 2 had come up. Cleared and it hasn't come up again. But still didn't fix the issue.
It feels to me like a dirty MAF sensor (from experience with other cars)- but the C63AMG w205 doesn't seem to have these. Are there any other sensors that could be dirty that would cause this issue and not throw up a code? Also the fact no code kind of rules out coils and oxygen sensors.
Once the car is parked up if i take it out when it's still warm it will do it straight away. If i leave the car for over an hour, it is fine again for another 15 minutes until warm and the problem starts again.
Any help will be greatly appreciated as i'm mentally getting prepared to get rid of the car - but I really don't want to as it drove so nice for the first 20K and still looks great.
I'm new on this forum and am using it as a last attempt to save my 2016 C63AMG W205 coupe. Any help or advice will be greatly appreciated. 20,000 miles and owned since new. Fully serviced by MB under service plans.
I have throughly researched the net on my problem and no existing issue is sounding exactly the same.
My car judders under acceleration once it's warm and has been running for 15 minutes.
It's been into Mercedes twice and they cannot find a fault code so to them it isn't a problem. They have applied an update to the ECU but it still has the problem. Feels like it is being strangled, it judders and hesitates under acceleration. If I am very violent with the accelerator and get it to kick down multiple gears, i can get it to clear. It is fine on 100% throttle but anything below seems to cause hesitation/juddering and an uncomfortable ride when warmed up. Also I only ever used Shell Optimax 99 octane.
I have started to tick cheap things off the list;
Into Mercedes twice for diagnosis - couldn't find anything wrong or get the problem to re-occur. Software update applied.
New spark plugs (seemed better for a day then back to normal)
Re-set gearbox (needed doing but didn't fix the issue)
Into Independent garage that also couldn't recreate the fault but found an exhaust flap sensor 2 had come up. Cleared and it hasn't come up again. But still didn't fix the issue.
It feels to me like a dirty MAF sensor (from experience with other cars)- but the C63AMG w205 doesn't seem to have these. Are there any other sensors that could be dirty that would cause this issue and not throw up a code? Also the fact no code kind of rules out coils and oxygen sensors.
Once the car is parked up if i take it out when it's still warm it will do it straight away. If i leave the car for over an hour, it is fine again for another 15 minutes until warm and the problem starts again.
Any help will be greatly appreciated as i'm mentally getting prepared to get rid of the car - but I really don't want to as it drove so nice for the first 20K and still looks great.
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Joined: Jun 2019
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From: Flat Earth
AMG C63s Sedan , AMG C43 , AMG G63 , GLK 250
Hi All,
I'm new on this forum and am using it as a last attempt to save my 2016 C63AMG W205 coupe. Any help or advice will be greatly appreciated. 20,000 miles and owned since new. Fully serviced by MB under service plans.
I have throughly researched the net on my problem and no existing issue is sounding exactly the same.
My car judders under acceleration once it's warm and has been running for 15 minutes.
It's been into Mercedes twice and they cannot find a fault code so to them it isn't a problem. They have applied an update to the ECU but it still has the problem. Feels like it is being strangled, it judders and hesitates under acceleration. If I am very violent with the accelerator and get it to kick down multiple gears, i can get it to clear. It is fine on 100% throttle but anything below seems to cause hesitation/juddering and an uncomfortable ride when warmed up. Also I only ever used Shell Optimax 99 octane.
I have started to tick cheap things off the list;
Into Mercedes twice for diagnosis - couldn't find anything wrong or get the problem to re-occur. Software update applied.
New spark plugs (seemed better for a day then back to normal)
Re-set gearbox (needed doing but didn't fix the issue)
Into Independent garage that also couldn't recreate the fault but found an exhaust flap sensor 2 had come up. Cleared and it hasn't come up again. But still didn't fix the issue.
It feels to me like a dirty MAF sensor (from experience with other cars)- but the C63AMG w205 doesn't seem to have these. Are there any other sensors that could be dirty that would cause this issue and not throw up a code? Also the fact no code kind of rules out coils and oxygen sensors.
Once the car is parked up if i take it out when it's still warm it will do it straight away. If i leave the car for over an hour, it is fine again for another 15 minutes until warm and the problem starts again.
Any help will be greatly appreciated as i'm mentally getting prepared to get rid of the car - but I really don't want to as it drove so nice for the first 20K and still looks great.
I'm new on this forum and am using it as a last attempt to save my 2016 C63AMG W205 coupe. Any help or advice will be greatly appreciated. 20,000 miles and owned since new. Fully serviced by MB under service plans.
I have throughly researched the net on my problem and no existing issue is sounding exactly the same.
My car judders under acceleration once it's warm and has been running for 15 minutes.
It's been into Mercedes twice and they cannot find a fault code so to them it isn't a problem. They have applied an update to the ECU but it still has the problem. Feels like it is being strangled, it judders and hesitates under acceleration. If I am very violent with the accelerator and get it to kick down multiple gears, i can get it to clear. It is fine on 100% throttle but anything below seems to cause hesitation/juddering and an uncomfortable ride when warmed up. Also I only ever used Shell Optimax 99 octane.
I have started to tick cheap things off the list;
Into Mercedes twice for diagnosis - couldn't find anything wrong or get the problem to re-occur. Software update applied.
New spark plugs (seemed better for a day then back to normal)
Re-set gearbox (needed doing but didn't fix the issue)
Into Independent garage that also couldn't recreate the fault but found an exhaust flap sensor 2 had come up. Cleared and it hasn't come up again. But still didn't fix the issue.
It feels to me like a dirty MAF sensor (from experience with other cars)- but the C63AMG w205 doesn't seem to have these. Are there any other sensors that could be dirty that would cause this issue and not throw up a code? Also the fact no code kind of rules out coils and oxygen sensors.
Once the car is parked up if i take it out when it's still warm it will do it straight away. If i leave the car for over an hour, it is fine again for another 15 minutes until warm and the problem starts again.
Any help will be greatly appreciated as i'm mentally getting prepared to get rid of the car - but I really don't want to as it drove so nice for the first 20K and still looks great.
Do you have any mods or changed the intakes ??
Is it correct to assume your car is out of warranty??
Thread Starter
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Joined: Apr 2021
Posts: 36
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C63AMG W205 Coupe
Hi there, thanks for responding.
No mods so far although a remap would be nice, I just don’t trust it at the moment.
Yes, it is out of warranty, however, Mercedes can’t work it out either.
At this stage I don’t even mind spending a bit of money on it, I just don’t like the thought of replacing many parts and sensors shooting in the dark.
No mods so far although a remap would be nice, I just don’t trust it at the moment.
Yes, it is out of warranty, however, Mercedes can’t work it out either.
At this stage I don’t even mind spending a bit of money on it, I just don’t like the thought of replacing many parts and sensors shooting in the dark.
Thread Starter
Junior Member
Joined: Apr 2021
Posts: 36
Likes: 3
C63AMG W205 Coupe
Hi thanks for responding. Wouldn't that generate a code? Also it behaves well 60% of the time.
It does feel like a sensor, opposed to a gearbox issue (as this seems to be changing up and down within expectation)
Possibly o2 sensor or map sensor but without a code it's shooting in the dark. Also there seem to be quite a few map sensors is there one that typically fails?
The problem started a week before i drove through a large puddle. Not sure if that's got any relevance or a sensor that may be more susceptible to water ingress? It was a pretty wet, rainy month.
Also fuel economy is great, no problems on start up and idles well which has caused me to discount map sensor.
It does feel like a sensor, opposed to a gearbox issue (as this seems to be changing up and down within expectation)
Possibly o2 sensor or map sensor but without a code it's shooting in the dark. Also there seem to be quite a few map sensors is there one that typically fails?
The problem started a week before i drove through a large puddle. Not sure if that's got any relevance or a sensor that may be more susceptible to water ingress? It was a pretty wet, rainy month.
Also fuel economy is great, no problems on start up and idles well which has caused me to discount map sensor.
Member
Joined: Sep 2020
Posts: 172
Likes: 10
From: Toronto
c63s coupe, bmw 335i coupe (winterbeater)
Could also be a ****ty ignition coil that’s on its way out. When they start going bad, it can happen intermittently and not throw any codes until it gets progressively worse... just a possibility... on my Beamer I had the same issue turned out to be coils, and I was on the same boat, had no codes or anything...
Thread Starter
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C63AMG W205 Coupe
Thanks Brian63s, yes i'm beginning to think the same thing. Some of the early cars seem to have this issue and mine was one of the 1st delivered in the UK after they had many hold ups and recalls (delivery was delayed 6 months). I have checked the MB database and they say mine isn't affected but i don't trust how close delivery it is in date to the recall.
Do i just need to bite the bullet and replace all 4 or is it likely to be just one? Also any idea on costs as it they seem difficult to find on Google. Cheers!
Do i just need to bite the bullet and replace all 4 or is it likely to be just one? Also any idea on costs as it they seem difficult to find on Google. Cheers!
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Member
Joined: Sep 2020
Posts: 172
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From: Toronto
c63s coupe, bmw 335i coupe (winterbeater)
Thanks Brian63s, yes i'm beginning to think the same thing. Some of the early cars seem to have this issue and mine was one of the 1st delivered in the UK after they had many hold ups and recalls (delivery was delayed 6 months). I have checked the MB database and they say mine isn't affected but i don't trust how close delivery it is in date to the recall.
Do i just need to bite the bullet and replace all 4 or is it likely to be just one? Also any idea on costs as it they seem difficult to find on Google. Cheers!
Do i just need to bite the bullet and replace all 4 or is it likely to be just one? Also any idea on costs as it they seem difficult to find on Google. Cheers!
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Thread Starter
Junior Member
Joined: Apr 2021
Posts: 36
Likes: 3
C63AMG W205 Coupe
It's a pretty mixed bag of driving really, but i do try and be kind to the car! The problem seemed to start soon after first lockdown where the car sat on the drive for 6 months with few, short journeys. Therefore, i think coils would make the most sense. Mercedes have told me there would definitely be a code generated with coils but others have said they gradually breakdown and only generate a code when they have had it. As you say, I think i'll order the 4 coils and rule them out. I'll check out the website too, thanks for the heads up.
Member
Joined: Sep 2020
Posts: 172
Likes: 10
From: Toronto
c63s coupe, bmw 335i coupe (winterbeater)
It's a pretty mixed bag of driving really, but i do try and be kind to the car! The problem seemed to start soon after first lockdown where the car sat on the drive for 6 months with few, short journeys. Therefore, i think coils would make the most sense. Mercedes have told me there would definitely be a code generated with coils but others have said they gradually breakdown and only generate a code when they have had it. As you say, I think i'll order the 4 coils and rule them out. I'll check out the website too, thanks for the heads up.
Junior Member
Joined: Apr 2021
Posts: 44
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C63 AMG(W205) 17'
I think I am seeing this same issue with my 17 coupe(50k miles). Showed the juddering/rpm stutter to the foreman at MB and he's still diagnosing the car(3 days without her 
). No codes.
seemed to be within the 3-5k rpm range. whole car shakes forward and back and all you see is the rpm stutter up and down before it shifts after it kicks down a gear to pickup. after that its perfectly fine.
Driving it hard does not reproduce the issue. and driving it calmly sometimes presents it but not as noticable. I initially thought it was the wheels not keeping traction lol
He said power delivery issue. Thank goodness I have a warranty!! Will keep you all posted in the case yours hasn't been resolved yet!
). No codes.seemed to be within the 3-5k rpm range. whole car shakes forward and back and all you see is the rpm stutter up and down before it shifts after it kicks down a gear to pickup. after that its perfectly fine.
Driving it hard does not reproduce the issue. and driving it calmly sometimes presents it but not as noticable. I initially thought it was the wheels not keeping traction lol
He said power delivery issue. Thank goodness I have a warranty!! Will keep you all posted in the case yours hasn't been resolved yet!
Thread Starter
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C63AMG W205 Coupe
Yes that seems pretty similar. if its the same issue, It will get worse to the point where it does it on most journeys hot or cold. I have ordered the 4 coil packs (£660) and hope they will fix it. I'd be very keen to hear if Mercedes do it for you under warranty. Apparently a massive weakness in the car. I can't believe no fault codes are coming up with this driving behaviour and mines only done 20,000 miles. Doesn't bode well for long term ownership. Please let us know what they replace when they fix the issue for you.
Junior Member
Joined: Apr 2021
Posts: 44
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C63 AMG(W205) 17'
Yes that seems pretty similar. if its the same issue, It will get worse to the point where it does it on most journeys hot or cold. I have ordered the 4 coil packs (£660) and hope they will fix it. I'd be very keen to hear if Mercedes do it for you under warranty. Apparently a massive weakness in the car. I can't believe no fault codes are coming up with this driving behaviour and mines only done 20,000 miles. Doesn't bode well for long term ownership. Please let us know what they replace when they fix the issue for you.
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Joined: Sep 2016
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From: Australia
⏱️ 700HP Facelift converted C63 S Coupe with Drexler 3.06 plated LSD
Our prefacelifts really suffered from the bad coil issue. Luckily the facelift owners got a recall for theirs.
In your case, it's either a bad injector or your coil.
For me, before my coil pack died, I got no codes or CEL. But I noticed a hiccup in the revs during idle every now and then and one time the car stuttered and almost stalled. No CEL or codes.
About 3 weeks later I was sitting in traffic doing nothing and suddenly the car shakes, the CEL appears and the car now sounded like it has a Subaru boxer engine 🤕
So I limped it to the indy and got it fixed.
The good thing is at least you'll be upgrading to a fresh set of coils and you won't need to worry about them for a long time.
Please let us know if the new coils resolves your issue.
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'17 C63S Estate (S205) / '14 CLS 550 SB (X218) / '17 E220d (S213)
Been there, done that. My car startet with that issue ~30k mls. After quite some research by my dealer, which included fixing some issues within the high pressure area of the intake, they tried to adapt the wet-clutch. This failed, as the ZF-wet-clutch (MCT) did not respond. So Mercedes-AMG Affalterbach advised my dealer to replace the wet-clutch. After that, all issues were gone, however, I suspect that the will come back in 30k mls.......
Thread Starter
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C63AMG W205 Coupe
God I hope not! That sounds expensive!
Did you get any fault codes? Mine seems to change up and down fine and is immediate in manual. Additionally it’s fine when you nail the throttle 100%. Was yours the same?
Im due to get coil packs done later in the week and then we’ll go from there. If it’s a gearbox issue she’s off!
Did you get any fault codes? Mine seems to change up and down fine and is immediate in manual. Additionally it’s fine when you nail the throttle 100%. Was yours the same?
Im due to get coil packs done later in the week and then we’ll go from there. If it’s a gearbox issue she’s off!
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'17 C63S Estate (S205) / '14 CLS 550 SB (X218) / '17 E220d (S213)
Absolutely no codes at all. This is why the research took so long. Actually the transmission itself is totally fine. The problem was the MCT-wet-clutch, that replaces the traditional torque converter. In a big german forum (motor-talk.de), we discussed that problem. Meanwhile approximately half a duzend user had the same issue.
Symptoms:
Symptoms:
- cold start - after engaging "D", the car does not start moving. One needs quite some throttle - the car starts moving, when RPM advance above ~2,000 rpm.
- after warm start, as soon as the transmission-fluid is warm (>50°C, AMG-screen in the driver information center the temperature changes from blue to white), the car tends to jerk under medium to higher loads between 1,000 and 3,000 rpm from time to time. Especially after a longer drive at constant loads (for example 15 miles with cruise control at 100 mph) or some high speed cruising (20 miles >150mph) without ripping through the gears.
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Joined: Jul 2011
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2019 AMG GT R
Absolutely no codes at all. This is why the research took so long. Actually the transmission itself is totally fine. The problem was the MCT-wet-clutch, that replaces the traditional torque converter. In a big german forum (motor-talk.de), we discussed that problem. Meanwhile approximately half a duzend user had the same issue.
Symptoms:
Symptoms:
- cold start - after engaging "D", the car does not start moving. One needs quite some throttle - the car starts moving, when RPM advance above ~2,000 rpm.
- after warm start, as soon as the transmission-fluid is warm (>50°C, AMG-screen in the driver information center the temperature changes from blue to white), the car tends to jerk under medium to higher loads between 1,000 and 3,000 rpm from time to time. Especially after a longer drive at constant loads (for example 15 miles with cruise control at 100 mph) or some high speed cruising (20 miles >150mph) without ripping through the gears.
Member
Joined: Aug 2019
Posts: 82
Likes: 14
From: Dallas, TX
2020 Range Rover Sport P525 Dynamic
Mercedes Xentry which they use for reading codes is great for software issues. I dont think its the best for hardware issues which is what my guess would be here. If I were you, I would try to find a mechanic whos worked on Benz cars and take it there and try to diagnose it. As for what it is, it almost sounds like one or more cylinders are shutting down. However that would throw up codes. So maybe actual damage to the cylinders (perhaps water got into them at some point)?
Senior Member
Joined: May 2013
Posts: 297
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'17 C63S Estate (S205) / '14 CLS 550 SB (X218) / '17 E220d (S213)
In Germany we have a 2 year warranty. After that, one can buy an extended warranty. All cases, that I am aware of, were either covered by the Mercedes extended warranty or by goodwill of Mercedes-AMG.
Member
Joined: Sep 2020
Posts: 172
Likes: 10
From: Toronto
c63s coupe, bmw 335i coupe (winterbeater)
Absolutely no codes at all. This is why the research took so long. Actually the transmission itself is totally fine. The problem was the MCT-wet-clutch, that replaces the traditional torque converter. In a big german forum (motor-talk.de), we discussed that problem. Meanwhile approximately half a duzend user had the same issue.
Symptoms:
Symptoms:
- cold start - after engaging "D", the car does not start moving. One needs quite some throttle - the car starts moving, when RPM advance above ~2,000 rpm.
- after warm start, as soon as the transmission-fluid is warm (>50°C, AMG-screen in the driver information center the temperature changes from blue to white), the car tends to jerk under medium to higher loads between 1,000 and 3,000 rpm from time to time. Especially after a longer drive at constant loads (for example 15 miles with cruise control at 100 mph) or some high speed cruising (20 miles >150mph) without ripping through the gears.
Member
Joined: Sep 2020
Posts: 172
Likes: 10
From: Toronto
c63s coupe, bmw 335i coupe (winterbeater)
