Well I changed the engine mounts. The whole car feels better. It is still loud when on the throttle, even at low speeds. Cruising below 2,500 rpm is really good. I have to listen to hear the engine. BUT, it is still howling/roaring up to 2,700 rpm. It changes pitch, at 2,400 to 2,500 rpm it gets that propeller or synchronized boat engine sound, either cruising or accelerating. At 2,800 or above it is much quieter, acceptably quiet, even when on the throttle. The only problem with that is, I'm doing almost 80 mph.
This problem is really annoying me.

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1987 300D 146K Original #14 Head
One eye on the road, the other on the temp. gauge

Gone But Not Forgotten
1983 380 SEL Long gone
1983 300SD Wish I hadn't traded it in on a 90' Corvette
1989 300SE My all time favorite
1995 E420 Went like a bullet