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Originally Posted by benzfan
I have has this exact problem on my c280 for 4 years now. I know it's nothing internal, as it bears none of the valve noise hallmarks and I have had my camchain/tensioner replaced with no effect. It happens cold only as the revs climb initially after the engine catching. It goes away almost immediately, but is embarrassing in a crowded parking lot. I'm guesing tensioner assembly myself, having had experience with the awful noise a bad one on my old 190e could create right off idle. If you rectify this one, please let me know how. I might try the replacement myself at Christmas if I get my holidays approved.
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This is the exact same as me. It revs high after catching then rattles hard and the noise drops away.
Cold start especially.
I did the test before to indentify the tensioner shock, I will try tomorrow with the tensioner. But like I said, it goes away so fast I don't have time. I guess I could have my wife start it while I lean on it.
And you're right, it is embarassing.....
If it is the tensioner, how long could I go before it does? I would replace asap, but should I drive something else until I get the part?
Has anybody replaced the tensioner here?
Thanks.
