I just began an install with two products from B-quiet.com
I ordered the hliner for the hood and 35 sq ft of their "Brown Bread" deadner. I put the deadner on the hood first then the hliner over it. I am lining the inside of the doors by removin the inner panels and using the peal-and-stick brown bread product. I then glued a thin layer of carpet pad (foam) on top of the deadner inside the door as well as lining the door panels with the foam before putting them back on the doors. The noise is going down with every additional layer and I believe the greatest reduction yet will be the firewall/floor.

I drove the 240 1,110 miles the day that I bought it (TX-GA) and it was a droning, draining experience. I just want to make it a more enjoyable trip when you spend hours under the wheel.

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Rick
Avid Benz watcher

Previously owned 126's: 2 1981 300SD's, 1987 300SDL, 1991 350SDL,
Previously owned 123's: 1978 300D, 1983 240D, 1985 300D
Previously owned 124: 1994 320TE

Currently:
2004 Toyota Sequoia SR5 206k
2010 Ford Edge 122k
Always looking for the next MB diesel!