No one talks about personal luxury cars anymore; use of that term peaked some 40 years ago. But the 2015 Mercedes-Benz S63 AMG coupe reminds us that, even if there isn’t a modern term for the concept, there remains a distinction between the average luxury car and one so egotistically over-the-top that it exists solely to serve, appease, and pamper its driver. Indeed, the S63 coupe is one of a few cars that exude power and opulence and status and rich excesses all while delivering a driving experience that makes you enjoy the time behind the wheel. For those who prefer to be driven, there are Bentleys and Rolls-Royces. For those who drive, the two-door S-class offers $172,450 of leather and luxury, a 3.7-second run to 60 mph, and a three-pointed star on the grille. FRESH TAKE ON A FAMILIAR IDEA Although the car is new, its place in the Mercedes lineup is not. The S-class coupe replaces the old CL-class as part of a scheme to reduce the dizzying number of Mercedes nameplates befo...