C63AMG W205 Juddering and Jerky under Acceleration
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Joined: May 2013
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'17 C63S Estate (S205) / '14 CLS 550 SB (X218) / '17 E220d (S213)
I would like to suggest, not to overreact. As long as the car is not juddering under medium load (boost gauge approximately in the middle), I would just enjoy my car. When it starts juddering with no fault codes at all (coils?) and the high pressure area of the intake-system has no leaks (diverter valves?), then I would take a closer look at the MCT. If the shop can adapt the clutch, it is most likely not broken. If it does not respond to the Star Diagnosis, the ZF-wet-clutch might be the problem.
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Joined: Apr 2021
Posts: 36
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C63AMG W205 Coupe
My intermittent juddering seems to be mostly when the car is being driven gently at the speed limit and then low to medium load is applied. A kick down often clears the judder - only for it to come back 10 minutes later.
I drove the car today on a hot day, around town, in a spirited manor and it didn’t miss a beat. However, I think the key here is I didn’t remove my foot from the accelerator for more than a few seconds to let it coast.
I have not experienced the high revs required from cold start to get it moving, other than if I washed it the day before and the callipers seized a little, or to release the hand brake. I have never applied the handbrake manually, I just let the car do it and drive off with it on. Sometimes, depending on slope this requires a little more throttle to remove the handbrake.
If coils don’t fix it, I’ll take your advice and look harder for a specialist in current AMG’s.
It is worrying just how many issues seem to be out there for this car, a potential money pit.
I drove the car today on a hot day, around town, in a spirited manor and it didn’t miss a beat. However, I think the key here is I didn’t remove my foot from the accelerator for more than a few seconds to let it coast.
I have not experienced the high revs required from cold start to get it moving, other than if I washed it the day before and the callipers seized a little, or to release the hand brake. I have never applied the handbrake manually, I just let the car do it and drive off with it on. Sometimes, depending on slope this requires a little more throttle to remove the handbrake.
If coils don’t fix it, I’ll take your advice and look harder for a specialist in current AMG’s.
It is worrying just how many issues seem to be out there for this car, a potential money pit.
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From: Australia
⏱️ 700HP Facelift converted C63 S Coupe with Drexler 3.06 plated LSD
These can be a handful to own and the problems our cars present at such a young age is quite disappointing 😒
Hoping your issue gets fixed soon mate. Please keep the thread updated with your findings.
Last edited by Jimmy_c63s; May 12, 2021 at 10:05 AM.
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C63AMG W205 Coupe
Cheers buddy, shame is I upgraded my 2013 6.2 to this and that felt so strong and well built all of the time. I didn’t have to touch it in over 3 years of ownership with double the mileage. Wish I had it back now.
I will certainly let the forum know if I can get to the bottom of this issue.
I will certainly let the forum know if I can get to the bottom of this issue.
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Joined: Apr 2021
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C63
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.
your not alone, my 2017 is doing exactly the same. Its in next week to have all the coil packs and spark plugs changed so I’m hoping that this will clear the juddering.
Mercedes gave it a B service with plugs and gearbox changes just before i brought it and the previous owner didn’t experience any issues, true or not! So it went back to them to check it over, they couldn’t find anything wrong with it so i took it to a local Merc specialists who when drove it said i can feel the issue but cant find it. Another specialist drove it and said its my Torque convertor but that day a code came up saying cylinder 5 was misfiring. So fingers crossed its the coils otherwise its going to Webuyanycar!!
one thing i did notice was that as soon as the juddering started if i came off the accelerator a little and reapplied it would go briefly but came straight back.
I’ll keep you posted, let us know how you get on.
Last edited by Mahoo2; May 12, 2021 at 09:03 PM.
Thread Starter
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C63AMG W205 Coupe
Hi Mahoo, yes that sounds pretty similar although I still don't have a fault code for a failed cylinder. However, yes the most noticeable behaviour is when you coast and then reapply throttle 0-50%. Anything higher requiring a kickdown sort of stutters and then clears. Feels like an ignition problem but no fault codes (which seems to point to the beginning of failing coils). It seems as though other people are having issues with the wet clutch and gearbox presenting similar symptoms, although my symptoms are not exactly the same as it's fine on 100% throttle and on cold start. If it transpires to be a gearbox issue at 20k mine will join yours at WeBuyAnyCar!
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C63
Hi Mahoo, yes that sounds pretty similar although I still don't have a fault code for a failed cylinder. However, yes the most noticeable behaviour is when you coast and then reapply throttle 0-50%. Anything higher requiring a kickdown sort of stutters and then clears. Feels like an ignition problem but no fault codes (which seems to point to the beginning of failing coils). It seems as though other people are having issues with the wet clutch and gearbox presenting similar symptoms, although my symptoms are not exactly the same as it's fine on 100% throttle and on cold start. If it transpires to be a gearbox issue at 20k mine will join yours at WeBuyAnyCar!
Well hopefully its the coils, the garage did say that MB could have damaged the coil sleeves when they replaced the spark plugs. I’ve been told that Failing coils wont show up a fault code even though they show signs. Dreading but cant wait for them to be done, pricey but worth it if it rectifies the issue.
where abouts are you?
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C63AMG W205 Coupe
Yeah same, small price to pay if I can keep the car. £660 for 4 and £150 fitting won't sit well if it does exactly the same thing after repair. Yeah, It feels like a MAF sensor or water in the distributor from previous old car issues, however, we don't have those anymore.
I'm north London and a local mechanic that worked on my previous Audi RS models is doing the coils. After my experience with Mercedes over the last 8 years with my AMG's I don't really trust them or their mechanics anymore.
Let me know if it works. Mine's booked for coils next Friday due to work commitments. I'll do the same and update the forum.
I'm north London and a local mechanic that worked on my previous Audi RS models is doing the coils. After my experience with Mercedes over the last 8 years with my AMG's I don't really trust them or their mechanics anymore.
Let me know if it works. Mine's booked for coils next Friday due to work commitments. I'll do the same and update the forum.
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2000 c230 kompressor special edition, 2012 E550 coupe (sold), 2017 C63 sedan (sold), 2018 C63S Coupe
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Joined: May 2021
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2014 C63
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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C63 AMG(W205) 17'
I am having a very similar issue. I did my best to try and record it. MB had it for a few days after I showed the tech on a drive and they couldn’t figure it out. They want it back in to dig further but wanted to get video proof. I’ll try to get a better one tomorrow
sorry if the videos are Sh**** lol!
sorry if the videos are Sh**** lol!
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Joined: Apr 2021
Posts: 71
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C63
Yeah same, small price to pay if I can keep the car. £660 for 4 and £150 fitting won't sit well if it does exactly the same thing after repair. Yeah, It feels like a MAF sensor or water in the distributor from previous old car issues, however, we don't have those anymore.
I'm north London and a local mechanic that worked on my previous Audi RS models is doing the coils. After my experience with Mercedes over the last 8 years with my AMG's I don't really trust them or their mechanics anymore.
Let me know if it works. Mine's booked for coils next Friday due to work commitments. I'll do the same and update the forum.
I'm north London and a local mechanic that worked on my previous Audi RS models is doing the coils. After my experience with Mercedes over the last 8 years with my AMG's I don't really trust them or their mechanics anymore.
Let me know if it works. Mine's booked for coils next Friday due to work commitments. I'll do the same and update the forum.
As for the issue I’m now stuck, either get the Torque converter changed as suggested by another mechanic or give it back. Decision time!!
let us know how you get on. Good luck
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C63
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!
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Joined: Apr 2021
Posts: 71
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C63
I am having a very similar issue. I did my best to try and record it. MB had it for a few days after I showed the tech on a drive and they couldn’t figure it out. They want it back in to dig further but wanted to get video proof. I’ll try to get a better one tomorrow
sorry if the videos are Sh**** lol!
sorry if the videos are Sh**** lol!
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From: Flat Earth
AMG C63s Sedan , AMG C43 , AMG G63 , GLK 250
If this is happening to so many people it must be a normal thing... these cars have very advanced systems to protect the car especially when cold.. and with me, only happens if the car is in comfort, if I up it in sport or sport + or even race the tranny engages right away. It’s only in comfort where it’ll rev up to like 2k then engage. Always happens on cold start as I’m reversing out of the driveway and switching it to D.
When in COMFORT mode, the car starts off in 2nd gear, thus needing more RPMs to move etc... putting the car in another mode, allows it to start off in 1st gear.
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C63 AMG(W205) 17'
I actually took my car back(needed it) I will be dropping it off again this coming week and just let them have it to diagnose it. But I have noticed on a dead cold start it does have to rev to 2k rpm to engage the gear(normal?). I have tried to get the dang judder on video but its so sporadic for me(heavy load, light load, etc.) I have some samples attached not sure if you can really tell? I will try to get a better video if needed?
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C63
I actually took my car back(needed it) I will be dropping it off again this coming week and just let them have it to diagnose it. But I have noticed on a dead cold start it does have to rev to 2k rpm to engage the gear(normal?). I have tried to get the dang judder on video but its so sporadic for me(heavy load, light load, etc.) I have some samples attached not sure if you can really tell? I will try to get a better video if needed?
https://youtu.be/15MPtQAQ914
https://youtu.be/jtI7a2njyVw
https://youtu.be/62MzRe4WgB8
https://youtu.be/15MPtQAQ914
https://youtu.be/jtI7a2njyVw
https://youtu.be/62MzRe4WgB8
Last edited by Mahoo2; May 21, 2021 at 01:06 PM.
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C63AMG W205 Coupe
Update for the thread - I had the coil packs changed this morning and on the drive home it was great for 15 mins then started kangarooing down the street. I’m going to enquire about costs for this torque converter/wet clutch but I really can’t be bothered with it anymore and suspect it will be sold back to Mercedes shortly (they don’t think there is anything wrong with it so hopefully they’ll give me good money) Unfortunately the whole saga has completely put me off the brand.
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C63
Update for the thread - I had the coil packs changed this morning and on the drive home it was great for 15 mins then started kangarooing down the street. I’m going to enquire about costs for this torque converter/wet clutch but I really can’t be bothered with it anymore and suspect it will be sold back to Mercedes shortly (they don’t think there is anything wrong with it so hopefully they’ll give me good money) Unfortunately the whole saga has completely put me off the brand.
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2005 E55
Run a can of bg44k fuel cleaner in the gas tank. If that don't work change out the primary o2 sensors
If the car is acting up part throttle it's reading off o2 sensors and wide open throttle it's going off closed loop values.
log your fuel trims and see if the car is running lean part throttle also.
Also inspect the o2 wire harness to see if its loose or damaged. Our cars are extremely hot in that area and can be wire harness related also.
If the car is acting up part throttle it's reading off o2 sensors and wide open throttle it's going off closed loop values.
log your fuel trims and see if the car is running lean part throttle also.
Also inspect the o2 wire harness to see if its loose or damaged. Our cars are extremely hot in that area and can be wire harness related also.
Last edited by skratch77; May 21, 2021 at 01:46 PM.
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C63 AMG(W205) 17'
Update for the thread - I had the coil packs changed this morning and on the drive home it was great for 15 mins then started kangarooing down the street. I’m going to enquire about costs for this torque converter/wet clutch but I really can’t be bothered with it anymore and suspect it will be sold back to Mercedes shortly (they don’t think there is anything wrong with it so hopefully they’ll give me good money) Unfortunately the whole saga has completely put me off the brand.
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C63 AMG(W205) 17'
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'17 C63S Estate (S205) / '14 CLS 550 SB (X218) / '17 E220d (S213)
Mercedes advised me to run three sets of mercedes fuel injector cleaner through three fuel gas tanks.
As this did not work out, I brought it back to the dealership and told them, that I would not take the car back, unless it would run great again. O2-Sensors were replaced by my dealership before asking Mercedes-AMG Affalterbach for help, as those sensors showed signs of aging.
All that stuff did not help.
As this did not work out, I brought it back to the dealership and told them, that I would not take the car back, unless it would run great again. O2-Sensors were replaced by my dealership before asking Mercedes-AMG Affalterbach for help, as those sensors showed signs of aging.
All that stuff did not help.
