This comparison represents a peek into three heavyweight luxury German carmakers' state of the art.
The Audi S7, BMW 650i Gran Coupe xDrive, and Mercedes-Benz CLS550 4Matic represent a good chunk of their respective brands' best thinking. But what are these swoopy four-door coupes? (And for the record, we hate the abuse of language that takes place every time a 2-ton sedan is called a "coupe.")
The cynical view is that the Germans invented a meal between breakfast and brunch. All three cars are variants of each manufacturer's midsize offering: The S7 is built off the A6; the Gran Coupe is based on the F12 6 Series (which is in turn based on the current 5 Series platform); and the CLS is born from the E-Class. So, each company has found a way to charge more money for essentially the same old mimosa and pancakes.