2013 C250 Idle Fluctuation +/- 50-100 rpm
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Joined: May 2015
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2013 C250
2013 C250 Idle Fluctuation +/- 50-100 rpm
Helllo,
I have a 2013 Mercedes C250. 44,000 miles.
I recently noticed my RPM needle fluctuating constantly +/- 50-100 rpm. This occurs constantly at idle and driving. Fully warmed up, engine idles at 600 rpm. Normally more noticeable once engine is fully warmed up. As I'm accelerating or maintaining a constant highway speed by foot or with cruise control, within a few seconds, you can see the needle go up and down very slightly. This symptom is present during idle as well. I tried searching different forums from Mercedes to other car makers and some are saying it's normal, some are saying its not. I have had only Japanese cars before and never noticed this issue so I am unsure if this is consider within normal limits for Mercedes.
The car itself drives perfectly fine. I don't feel any difference in performance throughout the rpm band. I do not hear any abnormal noise either.
I don't always keep constant watch on my RPM gauge so I am unsure how long this issue has been going on.
Thank you.
I have a 2013 Mercedes C250. 44,000 miles.
I recently noticed my RPM needle fluctuating constantly +/- 50-100 rpm. This occurs constantly at idle and driving. Fully warmed up, engine idles at 600 rpm. Normally more noticeable once engine is fully warmed up. As I'm accelerating or maintaining a constant highway speed by foot or with cruise control, within a few seconds, you can see the needle go up and down very slightly. This symptom is present during idle as well. I tried searching different forums from Mercedes to other car makers and some are saying it's normal, some are saying its not. I have had only Japanese cars before and never noticed this issue so I am unsure if this is consider within normal limits for Mercedes.
The car itself drives perfectly fine. I don't feel any difference in performance throughout the rpm band. I do not hear any abnormal noise either.
I don't always keep constant watch on my RPM gauge so I am unsure how long this issue has been going on.
Thank you.
MBWorld Fanatic!
Joined: Nov 2015
Posts: 1,282
Likes: 57
2013 C250 Sport
That is not normal, especially while driving. I've run rpm logs on my car and there is virtually no fluctuation.
It sounds like something vacuum/emissions systems related.
Are you still within warranty?
It sounds like something vacuum/emissions systems related.
Are you still within warranty?
Junior Member
Joined: Aug 2015
Posts: 36
Likes: 0
From: SF East Bay Area
13' C250 C204 Steel grey
I have had and still have this issue, been to mercedes twice, both time they reflashed the cluster, but as of now my jumps aren't as high at like yours but i still see then bouncing 10 rpms while idle or driving.
Thread Starter
Newbie
Joined: May 2015
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2013 C250
I took it in to Mercedes. They are going to run some tests. I'll keep you updated.
I'm glad to hear I'm not the only one having this issue. I'm sorry to hear they were not able to remedy your problem. I have a feeling this might be me as well. How is your car driving? Any problems driving with this problem?
Here is a video of the problem.
https://*******/photos/Hi8nHwNkSadScdt88
Let me know if the link works. Thanks.
I'm glad to hear I'm not the only one having this issue. I'm sorry to hear they were not able to remedy your problem. I have a feeling this might be me as well. How is your car driving? Any problems driving with this problem?
Here is a video of the problem.
https://*******/photos/Hi8nHwNkSadScdt88
Let me know if the link works. Thanks.
Last edited by mikenguyen85; Feb 27, 2016 at 11:11 PM.
Junior Member
Joined: Oct 2014
Posts: 70
Likes: 1
From: Tulsa, OK
2012 Mercedes-Benz C250 Sport W204
I too have had/still have this issue and have been told it is normal in these cars. I took it into the dealer while still under warranty, and they said they "updated the software on the instrument cluster", but the RPM needle was still going to bounce a little. The car drives perfectly, so I just left it alone.
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Newbie
Joined: Dec 2017
Posts: 1
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2013 c250 and 2005 c240
C250 idle
I have the same problem 2013 C250. My OBDII shows no fault codes
I have a 2013 Mercedes C250. 44,000 miles.
I recently noticed my RPM needle fluctuating constantly +/- 50-100 rpm. This occurs constantly at idle and driving. Fully warmed up, engine idles at 600 rpm. Normally more noticeable once engine is fully warmed up. As I'm accelerating or maintaining a constant highway speed by foot or with cruise control, within a few seconds, you can see the needle go up and down very slightly. This symptom is present during idle as well. I tried searching different forums from Mercedes to other car makers and some are saying it's normal, some are saying its not. I have had only Japanese cars before and never noticed this issue so I am unsure if this is consider within normal limits for Mercedes.
The car itself drives perfectly fine. I don't feel any difference in performance throughout the rpm band. I do not hear any abnormal noise either.
I don't always keep constant watch on my RPM gauge so I am unsure how long this issue has been going on.
Thank you.[/QUOTE]
I have a 2013 Mercedes C250. 44,000 miles.
I recently noticed my RPM needle fluctuating constantly +/- 50-100 rpm. This occurs constantly at idle and driving. Fully warmed up, engine idles at 600 rpm. Normally more noticeable once engine is fully warmed up. As I'm accelerating or maintaining a constant highway speed by foot or with cruise control, within a few seconds, you can see the needle go up and down very slightly. This symptom is present during idle as well. I tried searching different forums from Mercedes to other car makers and some are saying it's normal, some are saying its not. I have had only Japanese cars before and never noticed this issue so I am unsure if this is consider within normal limits for Mercedes.
The car itself drives perfectly fine. I don't feel any difference in performance throughout the rpm band. I do not hear any abnormal noise either.
I don't always keep constant watch on my RPM gauge so I am unsure how long this issue has been going on.
Thank you.[/QUOTE]
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Junior Member
Joined: Apr 2018
Posts: 22
Likes: 8
From: Canberra, Australia
2010 c250 cgi, 2001 Porsche Boxster S
Idle shouldn't fluctuate. One possibility is that there's an air leak somewhere. A common culprit is the PCV hose that runs from the top back of the valve cover (on RHS) to the air intake hose, just before the turbo. The section that fails is actually a part of the air intake hose assembly - the rubber hose at the front RHS of the engine. The hose tends to perish and tear where it joins the air intake hose - it often isn't very obvious.
Member
Joined: Jun 2017
Posts: 84
Likes: 8
2013 benz c250
I had a similar problem with my C250 and thank god is was under warranty still. It turned out to be my High Pressure Fuel Pump, which turned out to be on back order from Germany so the dealership had my car for 3 months waiting on the part, But sounds like if they've already flashed you ECU, then it could be a HPFP? But if it turned out to be this, and if your car is under warranty still.... See about being compensated if they end up keeping your car for more than a month. I still have car payments on mine and was able to submit a request and approved of getting 3 months of car payments reimbursed even though they did give me a loan car. FYI.
Newbie
Joined: Feb 2021
Posts: 14
Likes: 3
2013 Mercedes Benz C250
2013 Mercedes Benz C250
55.000KMS
Car was previously going into LIMP MODE, jerking back and forward while driving, shut the engine off and sometimes dosent start up after a while. Just picked up from Mechanics. Had a Faulty Electronic Plate , Replaced it for $2300 including GST LABOUR ETC . Took the car for a drive jerking has stopped limp mode has stopped, but noticed when i step on it or drive it seems like the revs are going higher then it should be and when i floor it the rev is going heaps high. can anyone help me
55.000KMS
Car was previously going into LIMP MODE, jerking back and forward while driving, shut the engine off and sometimes dosent start up after a while. Just picked up from Mechanics. Had a Faulty Electronic Plate , Replaced it for $2300 including GST LABOUR ETC . Took the car for a drive jerking has stopped limp mode has stopped, but noticed when i step on it or drive it seems like the revs are going higher then it should be and when i floor it the rev is going heaps high. can anyone help me
MBWorld Fanatic!
Joined: Sep 2013
Posts: 2,346
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2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
2013 Mercedes Benz C250
55.000KMS
Car was previously going into LIMP MODE, jerking back and forward while driving, shut the engine off and sometimes dosent start up after a while. Just picked up from Mechanics. Had a Faulty Electronic Plate , Replaced it for $2300 including GST LABOUR ETC . Took the car for a drive jerking has stopped limp mode has stopped, but noticed when i step on it or drive it seems like the revs are going higher then it should be and when i floor it the rev is going heaps high. can anyone help me
55.000KMS
Car was previously going into LIMP MODE, jerking back and forward while driving, shut the engine off and sometimes dosent start up after a while. Just picked up from Mechanics. Had a Faulty Electronic Plate , Replaced it for $2300 including GST LABOUR ETC . Took the car for a drive jerking has stopped limp mode has stopped, but noticed when i step on it or drive it seems like the revs are going higher then it should be and when i floor it the rev is going heaps high. can anyone help me
Newbie
Joined: Aug 2021
Posts: 4
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E-CLASS
I have the same problem 2013 C250. My OBDII shows no fault codes
I have a 2013 Mercedes C250. 44,000 miles.
I recently noticed my RPM needle fluctuating constantly +/- 50-100 rpm. This occurs constantly at idle and driving. Fully warmed up, engine idles at 600 rpm. Normally more noticeable once engine is fully warmed up. As I'm accelerating or maintaining a constant highway speed by foot or with cruise control, within a few seconds, you can see the needle go up and down very slightly. This symptom is present during idle as well. I tried searching different forums from Mercedes to other car makers and some are saying it's normal, some are saying its not. I have had only Japanese cars before and never noticed this issue so I am unsure if this is consider within normal limits for Mercedes.
The car itself drives perfectly fine. I don't feel any difference in performance throughout the rpm band. I do not hear any abnormal noise either.
I don't always keep constant watch on my RPM gauge so I am unsure how long this issue has been going on.
Thank you.
I have a 2013 Mercedes C250. 44,000 miles.
I recently noticed my RPM needle fluctuating constantly +/- 50-100 rpm. This occurs constantly at idle and driving. Fully warmed up, engine idles at 600 rpm. Normally more noticeable once engine is fully warmed up. As I'm accelerating or maintaining a constant highway speed by foot or with cruise control, within a few seconds, you can see the needle go up and down very slightly. This symptom is present during idle as well. I tried searching different forums from Mercedes to other car makers and some are saying it's normal, some are saying its not. I have had only Japanese cars before and never noticed this issue so I am unsure if this is consider within normal limits for Mercedes.
The car itself drives perfectly fine. I don't feel any difference in performance throughout the rpm band. I do not hear any abnormal noise either.
I don't always keep constant watch on my RPM gauge so I am unsure how long this issue has been going on.
Thank you.
How is your car now? Has the problem of idling jitter caused more serious problems in the future?
I just bought an E-class, I am also troubled by this problem and I don’t know what the consequences will be. There are very few results that Google can search, so if you can see this reply, I hope I can get some useful information from you. Information.
My mechanic did not find a way to solve this problem and there is no fault code displayed. The driving condition of the vehicle is very good, at least I did not feel any power attenuation.
I hope you can understand. I have tried very hard to express it, but English is not my first language.
Newbie
Joined: Sep 2024
Posts: 3
Likes: 0
w204
somewhat related to this. there is a backpressure sensor that might be faulty. this creates the sort of fluctuations. I changed mine when changing transmission oil and the fluctuations are gonne now. mechanicc had to check with computer to detect this is faulty sensor.
