The 2011 Cadillac CTS Coupe is the latest addition to the lineup of Cadillac's best-selling cars. The 2-door coupe joins 4-door sedan and wagon body styles, which see no major changes for 2011. The coupe seats 4 while other versions seat 5. The sedan and wagon reprise 3.0 and 3.6 trim levels. Depending on body style and drivetrain, trim levels include Base, Luxury, and Performance.