Cadillac's smallest sedan gets revised sport and performance packages for 2006. Three models are offered. CTS 2.8 has a 210-hp V6. CTS 3.6 has a 255-hp V6. The high-performance CTS-V has a 400-hp V8. A 6-speed manual transmission is standard for all. V6s offer a 5-speed automatic with manual shift gate. Also standard are ABS, front side airbags, curtain side airbags, and OnStar assistance. Leather upholstery is optional for the 2.8, standard elsewhere. For '06, the available Sport Package adds to V6s a limited-slip differential, antiskid system, xenon headlights, sport suspension, and 17-inch wheels vs. 16s. The revised Wheel Performance Package adds to the 3.6 model speed-variable steering assist, uprated brakes, sport suspension, load-leveling suspension, and 18-inch wheels. Added during the model year, the Wheel Sport Appearance Package gives the 3.6 CTS-V-style trim elements. CTS-V includes the sport suspension, uprated brakes, antiskid system, and 18-inch wheels with run-flat tires. A navigation system with voice activation is optional for V6 models, standard for CTS-V.