My 230CE has basically the same engine as the 190E with the M102 2.3L. Lately, maybe the last few hundred miles, I hear what sounds like the timing chain rattling at rpm's higher than about 3500. I don't hear anything below that. At first I thought it was the idler pulley going out, I replaced it and I still heard the same sound, sort of like a metallic slap. Has anyone had one break with the similar sounds happening? Is it difficult to replace?

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DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012