2012 Mercedes-Benz C-Class Coupe

Mercedes-Benz likes to launch technologies and lead trends, but sometimes they follow along with the crowd. In this case, Hyundai's doing it. Chevy's doing it. Chrysler's going to do it. Even Porsche will be doing it. And now Mercedes-Benz has joined the gang: The luxury carmaker too will fit a downsized, turbocharged, four-cylinder engine to a car where sixes were previously the rule (or at least a popular option). The German brand will offer a 1.8-liter turbocharged four-cylinder engine to its 2012 C-Class, the first four it has offered in the U.S. in several years. More striking, it...