Question about 1984 Mercedes-Benz 190

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I own a mercedes 190e 2.5 16v cosworth 1990 model I have noticed that it has developed a knocking sound rather like a grandfather clock. This seems to come from the fuel tank and might be something to with a component that feeds fuel to the engine It drives normally but this knockingis getting more frequent and mechanics are at aloss to know what to do about it

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You may want to check first if the knocking sound proportionately increases speed or decreases with engine RPM. If it does, that should tell a clue as to where to look for the sound. Could be mechanical. I suggest to isolate the problem first, when it occurs, conditions present when it does etc...

Posted on Jul 23, 2008

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