Hello, since February 2009 I drive an R320 CDI, first registration 11/2006. My flying carpet now has a mileage of about 35,000 KM. Actually I am very satisfied and enjoy the ride comfort and the many technical helpers. Now my first contribution starts with a (at least for me) exciting Knüller: On both rear doors I noticed in some places “paint underwalk”. I am not talking about small lacquer inclusions, but partly b is about 10 cm long, irregular fine “branches” on the door sides, which is facing the body. Pretty close to the welding-sealing or adhesive seam of the doors. Last week I was at my Mercedes-contract workshop and asked for a visit to my doors. The friendly body builder immediately informed me after paint density measurement without abnormalities, that it could be a kind of corrosion. A new appointment for the “damage up” hme” I have now on 27.08.09. Then a “Kulanz-Request” should be created to Berlin, for the purpose of taking over costs for repair or for two new doors. I think I will insist on two new doors, after all we speak here of a vehicle, which is not yet 3 years old!!! Dr. Z. gives after all 30 years guarantee against rusting (well, he is not yet through…)! Does someone have similar experiences on his R-Class or can give me tips on the further procedure?