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I'm new to the forum and MBs in general, but my 94 C280 has started running rough when it heats up. Until then it runs like I would expect a MB to run, but as soon as I've driven more than 15 miles or so in the city, it's rough. I can put it in park and it still idles rough. It does not get any worse once it starts doing it, but it is very annoying and probably detrimental to the health of my motor. Any help would be greatly appreciated!<br>
Thanks, Adam.
 

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Adam,<br> <br> Check with your local MB dealer. I believe there is a defect on the head gasket for your C280 that may cause the symptons you are seeing. <br> <br> Matt<br>
 

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Mine does the same thing when the AC is on. I think it's the fan. As soon as I turn off the AC, the noise stops.
 
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