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Weird occasional jerking W204 C220cdi manual

 
Old 05-09-2019, 01:27 AM
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W204 C220cdi Avantgarde AMG-styling
Weird occasional jerking W204 C220cdi manual

Hello all!
Car is 2010 C220cdi manual estate.
I've had this odd issue for a while now. Occasionally (some day yes, some other day no) there are odd slight jerking when driving e.g. 2 or 3 gear (in smaller gears you can feel it more clearly) ~1500 rounds. Not so big difference but noticeable anyhow. Starting the car or anything wont help. On next day it's probably gone. When I stop the car and come out, I can smell the brakes. One noticeable thing when the issue is on is that just after changing the gear throttle is not responding immediately (there is a really small drop before full throttle).
Nozzles have been investigated, throttle values has been reset, no fault codes, I've been trying to change the traction control off while driving. Nothing helps.
Do anyone have a any kind of experience of this kind of "features"?
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Old 05-10-2019, 02:46 PM
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C220 bluetec manual w205
I notice sometimes some similar in second gear if is somewhere between 1100-1600rpm. Not always. Usually in city driving. I did not gave it too much attention because i thought that is just under power. Is true that's a strange behavior. I am not sure if is something "normal" or not. This happens rarely. I usually change next gear when I'm over 2300rpm. Also on manual om651

Ps: i had similar behavior on the previous car that was also a diesel-manual gearbox
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Old 05-12-2019, 03:10 AM
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Yeah, that is weird.. Idle is totally normal. Did you ever get any cure for the issue?
I heard from one mb repairman that there has been some brake issues in some Vitoís causing something like I have, but cutting the traction control doesnít help (as it has been helped in a case of Vitoís). Itís really hard to figure out is the hot brakes reason (something wrong in brake units etc) or just result of some other issue..
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Old 05-12-2019, 04:38 AM
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C220 bluetec manual w205
I do not think that has to do with brakes. This happens when the engine is under power curve ( 1000-1500rpm). More likely has to do with injection map, or flywheel. That's my opinion. At least in my case tis is not a issue. Just change gears higher in rpm range. (Over 2300rpm depending of driving conditions)
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Old 05-14-2019, 01:27 AM
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In my case it doesn't effect if I'm driving 3000 or 1500 rounds. When the fault is on it's on and I can feel it clearly.
My wild ques is that there is some sensor (throttle pedal etc) which is causing the whole thing. Why I think so; The issue is occasionally, it won't happen every time when I'm driving. In a case of flywheel/injection map it would come every time.
But like I wrote, the oddness is that there are no sign of any faults in error log..

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Old 05-15-2019, 10:42 PM
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2008 E320 Bluetec
Could it be the torque converter locking up? I think mine does it 2 different levels and it kind of jerks forward.
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Old 05-16-2019, 12:26 AM
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In gearbox? Is there that kind of converter when it's manual..?
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Old 05-16-2019, 09:42 PM
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So sorry, missed it being a manual. No, no torque converter.
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Old 05-17-2019, 10:44 AM
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R320, Astro, JSW, ST4
troubleshooting

Odd combination (lurching and brake smell).

Isolate which brake(s) may be sticking, suspect only a front caliper would have enough effect to contribute to a drive ability problem.
At 9 years old you may have turbo vanes sticking or the vane ring worn.

Another possibility is a leaking boost host, look for oil and feel for split.
The boost control modulation may make the air pressure flutter, trying to get requested/actual level right when there's a non-catastrophic leak.

Last edited by B34chBum; 05-17-2019 at 10:46 AM. Reason: finish
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Old 05-25-2019, 02:03 AM
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Yes, Iíve tried to feel what would be the warmest disk but no luck yet. They all seems to be very warm and thatís why the smell.

That turbo issue might be one reason. There are some oil in lowest left corner of cooler (looking from the front of the car) but still the question with that one would be: Why it doesnít do that all the time?
Turbo vanes sticking could cause that kind of occasionally issue..

Iíve been driving the car for 50tkm and this hasnít change, not a better or worse direction.. There is now 239tkm.
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