In its third year of production, the all-wheel-drive Porsche Cayenne SUV was available in three trim packages for 2005. The entry-level base Cayenne was powered by a 3.2-liter V6 engine, which produced 247 horsepower. Stepping up a notch, the Cayenne S received a 340-horsepower, 4.5-liter V8, while the high-end Cayenne Turbo came equipped with a turbocharged 4.5-liter V8 engine that pumped out 450 horsepower. For the first time, a six-speed manual transmission was added to the standard equipment list for the base Cayenne. The manual transmission included Porsche's Drive-Off Assistance system, which provided automatic braking on steep slopes until the driver engaged the clutch and transmission. A six-speed automatic Tiptronic transmission, with a gate for manual shifting, was standard on the Cayenne S and Cayenne Turbo models and optional on the entry-level model. Standard features for the Cayenne included air conditioning, power windows and door locks, leather seats with power adjustments in the front, a full array of airbags, cruise control, a leather-wrapped steering wheel, a powered rear tailgate, and an AM/FM stereo system with a CD player. Options included a power sunroof, wood trim, and a CD changer. Many drivers liked the Cayenne's new manual transmission, noting that it was a good replacement for the automatic transmission, which some drivers considered problematic -- not to mention the fact that the manual gave drivers a better feel for the vehicle. The Cayenne's responsive handling, firm suspension, smooth turning ability, comfortable interior, and safety features were also cited as positive points by drivers.