It's a case of perspective raoul. You see the Cayenne as diluting the heritage of Porsche. I see the 911 as being the epitome of a long lineage of the most successful sports car in history. To me the Cayenne is merely an addition to the Porsche model range and in no way does it detract from the heritage of the brand. The Cayenne clearly has a place in Porsche's model portfolio. It's the application of the diesel engine and not the diesel engine (and all of its less than sporty characteristics) itself that we ought to be worrying about. It's not like they're putting the engine in 911 GT3 DS. Remember too that Porsche in the past has had some less than true-to-type models such as the horrid little 924 and the enormous 928. And still, the heritage persists untarnished. The world may not necessarily need a BMW X6 but Porsche sure as hell need the Cayenne.