found out what the problem was......something in the catalytic converter is loose. I will take it to my muffler guy tomorrow to have him look at it.

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1990 190E 3.0L

Could be the heat shield is just loose and needs to be welded. Happened to my old 1993 300E (3.2) "E320".

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".