Hi,

I have a 1996 E300D with approx. 130k miles on it. I just recently started hearing a tapping noise. Using a auto stethoscope I have tried to pinpoint the noise...it seems loudest when I put it on top of the black plastic cover that sits overtop the center of the engine.....the part nearest the firewall.

Any ideas or suggestions on what this might be ? Perhaps a worn rocker or sticking lifter ? Is there a regular adjustment required to the valve train ?

Thanks in advance for your help !

Brian

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1987 560SL - 95K
1996 E300D - 183K
1997 E300D - 162K
1982 240D - 160K