This location allowed design chief Ian Callum to show off the new luxury sedan’s plan view and thus its most controversial feature, its piano-black trim. The 2010 Jaguar XJ features a piece of the trim on the roof rails connecting the C-pillar to the other edge of the rear quarter-window. The piano black trim, which shows up only close up on metallic black or British Racing Green paint, stands out like a piece of protective trim covering on virtually any other paint color silver, for example. The XJ is a bigger car than it looks. Jaguar worked hard on the sedan’s aerodynamics, for high-speed stability and low wind noise and fuel efficiency.