C240 Stuttering please help - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 11-16-2008, 07:07 PM Thread Starter
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C240 Stuttering please help

I have a 2002 C240 that drives like the car is in great condition when at high RPM; however when you are at low RPM the car starts to act like it wants to cut off and then when you start to move again it stutters until you speed up and get going again. I had the wires and plugs replaced, the alternator and the catalytic converter replaced in the last three months after coming home from the shop I now have the above problem. I have taken it to the MB dealer as well as a local garage and neither are able to detect a code and find a problem. The local garage owner suggested we attempt to replace some type of sensor; however I feel we are playing a game of trial and error. Oh one more thing the alternator/battery light comes on sometime when stopping during the stuttering stage of the process. Light stays on for a few minutes and then goes off. I appreciate any feedback, I really enjoy the car it has been great car so I just want to get to the bottom of this.
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post #2 of 4 (permalink) Old 11-27-2008, 10:42 AM
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How many miles on this car?
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post #3 of 4 (permalink) Old 11-27-2008, 10:59 AM
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Hey, PW, welcome to the forum. Please take a minute to click the User CP link and complete your BW profile re: vehicle and location as that is often useful information.

Are you a DIY guy at all?

The alternator light at this point is a red herring. It's coming on because as the engine is stumbling (near dying?) the alternator isn't turning quickly and consistently enough to keep up the voltage, so you can stop worrying about that.

My first thought when I read your tale was a Crank Position Sensor. It's pretty easy to change and quite often does not throw a code. Symptoms vary, but the more consistent one is that it acts up more when hot than cold. If that holds true for your car then I'd change that. Part is pretty cheap ($40 at autohausaz.com), simple to DIY except that a bit of it is by feel. You're probably looking at $200-$250 to have it changed depending on your location, so it's worth the DIY effort.

Take care and enjoy the ride,

Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy; its inherent virtue is the equal sharing of misery. (Winston Churchill)
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post #4 of 4 (permalink) Old 12-11-2008, 09:44 AM Thread Starter
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Originally Posted by 2006c230Mike View Post
How many miles on this car?
There are 98000 miles on the car
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