The body is in very good shape, otherwise I would not even consider buying this car. If I would switch it over to a 3.0, what would be involved in that? Are the transmissions interchangeable? Correct me if I'm wrong but isn't the 3.0 a 5 cylinder and the 3.5 a 6 cylinder? Just a side thought here but it was always my understanding that MB had an outstanding mechanical reputation. After surfing some of the topics I find that reputation is not accurate. What is the advantage for paying more for repairs and parts if the results are the same as other car manufacturers?