RunningTooHot,

On my 1982 240D my daughter started complaining about the car getting louder and I began looking it over. The exhaust system was a little used here and there so we put a new pipe in from the manifold to the resonator, and a new resonator. Helped but did not completely solve the problem. Then I found the flexible connection between the intake and exhaust controlled by the EGR valve had a big hole in it. Changed that (very sharp edges!) and it got a little better. So I left it alone for a while and she continued to complain. Then I found the exhaust manifold was loose. New gasket for intake and exhaust and new fasteners, and the problem was conquered. It is still not a quiet car, but I think it is back to its original annoying noise level instead of objectionable level. At least my daughter's response changed, so I count that as a success. Good luck, Jim

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Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)