The S-class has always been synonymous with luxury, and it continues that proud tradition. The rear-wheel-drive sedan comes standard with a 449-hp 4.7-liter twin-turbo V-8; all-wheel drive is optional. The stunning coupe has the V-8 and all-wheel drive; it’s quite nimble for its size. A rear-drive cabriolet is available with the same engine. Then there’s the S600, with a 523-hp twin-turbo V-12 and rear-wheel drive. A plug-in hybrid is available, rated to earn 58 MPGe combined.