Thanks Jay Bob, I will persue my high mileage badge at my next oil change.
Yes I had the oil leak by the turbo inlet early on and it was fixed under warranty. It was the inexpensive rubber boot that you mention.
I don't mind the urea. I have read that the urea treatment is a less restrictive way of dealing with the emissions then the filtering in our CDIs. As a result the blutec engines have a bit more horsepower.
I just wish that the MB design engineers would figure a way to fit both the spare tire and the urea tank in the car.
I have never read a positive thing about run flats. I would accept a rear tire carrier ala the original G wagon. Good rear crash protection too.