BMW vs Mercedes vs Audi: Which Is Best?

These three cars do battle to be the largest selling premium brand. As to why it is so important to hold that title I am not sure. It seems to be a very German thing, the competitiveness of it all. Does it matter to a potential buyer which one sells more cars? Now on to my assessment, based on observation as I am not a motoring journalist whisked off to exotic locations to test them on amazing