Buick’s Lucerne is the brand’s flagship sedan, and comes standard with many nice features. For 2007, minor upgrades include GM’s OnStar communications program—now with Directions & Connections featuring Turn-by-Turn navigation, which delivers directions from a live operator and records them for playback to guide you to your destination. A chrome grille is available on CXL and CXS trim levels, and a heated and leather-wrapped steering wheel, plus a touch-screen navigation system are featured. New interior shades include Cocoa/Cashmere or Cocoa/Shale, and Light Quartz Metallic and Gold Mist Metallic are the new exterior hues.