L.A. Auto Show 2015: 2016 Mercedes-Benz SL Roadster
What is it: Mercedes is refreshing the vaunted SL line, adding a 450 version to the 550 and two AMG models, bringing a slightly more affordable entry-level car to this high-end division. Why it matters: In a strengthening economy, the luxury sports car segment is hot again. Porsche is coming out...