Cadillac's largest car returns little-changed for 2007. All DTS models have front-wheel drive and a 4.6-liter V8 with 4-speed automatic transmission. Base, Luxury I, Luxury II, and Performance models are offered. Base and Luxury have 275 hp. Performance models have 292 hp, firmer suspension tuning with automatic-adjusting shock absorbers, and 18-inch wheels vs. 17s. Every DTS has ABS, traction control, front side airbags, and curtain side airbags. Also standard are leather upholstery, remote engine start, load-leveling suspension, xenon headlights, and OnStar assistance. An available front bench seat on Luxury versions increases passenger capacity to six from five. A sunroof is optional. An antiskid system and front/rear obstacle detection are standard on Luxury I, II, and Performance models. So are heated/cooled front seats and heated rear seats. Optional on these models are a navigation system with voice recognition and adaptive cruise control.