2005 Buick Park Avenue Ultra 3.8L Supercharged V6, 4-speed automatic gearbox, Coveted, fully equipped luxury sedan, sunroof, power everything, AM/FM/CD player + 12 disc changer in trunk, Dual Zone climate control, heated leather seats, tilt-adjustable steering wheel, self leveling suspension, Heads Up Display, this car is a very comfortable, pillowy soft ride, with miles of legroom in the back seat. 18/28 MPG Premium Unleaded required. 18 Gallon Fuel Tank. Only One Like it for Sale in the whole country.