New, Need help
Thread Starter
Newbie
Joined: Nov 2009
Posts: 5
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w204 200K Avangarde
New, Need help
Hi all,
I am new with Mercedes and would most appreciate any assistance.
The problem is my C200K (Auto) rpm drops to a level (still above 500pm) where I can feel the engine /steering wheel vibrates (feels like engine dying but never died once so far) whenever I slow down to less than 10kmh, what could be wrong?
I have cleaned the idle valve, re-programmed as well tried with either C or S mode.
Other the above, everything works fine on the move.
Any assistance/sharing on this experience greatly appreciated.
Thank you
I am new with Mercedes and would most appreciate any assistance.
The problem is my C200K (Auto) rpm drops to a level (still above 500pm) where I can feel the engine /steering wheel vibrates (feels like engine dying but never died once so far) whenever I slow down to less than 10kmh, what could be wrong?
I have cleaned the idle valve, re-programmed as well tried with either C or S mode.
Other the above, everything works fine on the move.
Any assistance/sharing on this experience greatly appreciated.
Thank you
MBWorld Fanatic!
Joined: Jan 2009
Posts: 5,113
Likes: 57
From: Southwest USA
Another round of ICE
Isn't there an electronic idle stabilizer, which would not be susceptible to cleaning, etc. if it has become faulty? I think it's time for a diagnostic plug-in at the dealer!
MBWorld Fanatic!
Joined: Oct 2008
Posts: 2,601
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From: Atlanta, GA
2008 C300 Sport 6 Speed Manual, 1953 Chevy Bel-Air, 2015 Audi allroad, 1963 Chevy Apache
What is your idle RPM supposed to be? If it is running below that, I agree with Sportstick that your engine electronics are likely the culprit with a faulty sensor being the most likely cause.
Super Member
Joined: Aug 2009
Posts: 964
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If you're still under warranty I'd let the dealership plug it in and diagnose it. If not, you can start with some Sea Foam and replacing your air filters (due at 50k right?) if you haven't already. If that doesn't work, then you're going to the mechanic regardless.
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Joined: Aug 2009
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95 should be what is recommended by Mercedes.. It might not hurt to fill up on a tank of Shell Power-V, which country is the op in? I would always go with the highest rated if he's in Eastern Europe.
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Thread Starter
Newbie
Joined: Nov 2009
Posts: 5
Likes: 0
w204 200K Avangarde
Dear all, thanks for the feedback and suggestions, most appreciate it.
Unfortunately, an engine diagnosis revealed no fault. I have tried 97 Octane fuel, still no difference. Air filter had been changed too. The RPM on idle is around 700-800 with the aircon and lights on. It is only when I slow down say to a junction that I get the symptons.
Could it be foul plugs? Gearbox? The mechanic had also checked the engine mountings and they are ok. He suggested that it could be a loose/worn alternative bearing taking an extra load.
Any one had these symptons before?
Thanks to all in advance.
Unfortunately, an engine diagnosis revealed no fault. I have tried 97 Octane fuel, still no difference. Air filter had been changed too. The RPM on idle is around 700-800 with the aircon and lights on. It is only when I slow down say to a junction that I get the symptons.
Could it be foul plugs? Gearbox? The mechanic had also checked the engine mountings and they are ok. He suggested that it could be a loose/worn alternative bearing taking an extra load.
Any one had these symptons before?
Thanks to all in advance.
Senior Member
Joined: Nov 2005
Posts: 253
Likes: 0
From: Hartford, CT USA
2013 C300 Sport 4Matic
Dear all, thanks for the feedback and suggestions, most appreciate it.
Unfortunately, an engine diagnosis revealed no fault. I have tried 97 Octane fuel, still no difference. Air filter had been changed too. The RPM on idle is around 700-800 with the aircon and lights on. It is only when I slow down say to a junction that I get the symptons.
Could it be foul plugs? Gearbox? The mechanic had also checked the engine mountings and they are ok. He suggested that it could be a loose/worn alternative bearing taking an extra load.
Any one had these symptons before?
Thanks to all in advance.
Unfortunately, an engine diagnosis revealed no fault. I have tried 97 Octane fuel, still no difference. Air filter had been changed too. The RPM on idle is around 700-800 with the aircon and lights on. It is only when I slow down say to a junction that I get the symptons.
Could it be foul plugs? Gearbox? The mechanic had also checked the engine mountings and they are ok. He suggested that it could be a loose/worn alternative bearing taking an extra load.
Any one had these symptons before?
Thanks to all in advance.
