Performance: The Audi A6 2006 comes with a variety of engine options, including a 3.2-liter V6, a 4.2-liter V8, and a 5.2-liter V10. The V6 engine produces 255 horsepower and 243 lb-ft of torque, while the V8 engine produces 335 horsepower and 310 lb-ft of torque. The V10 engine produces 435 horsepower and 398 lb-ft of torque. The Audi A6 2006 also comes with a six-speed automatic transmission and quattro all-wheel drive as standard.

Fuel economy: The fuel economy of the Audi A6 2006 varies depending on the engine option. The V6 engine has an EPA rating of 18 mpg in the city and 25 mpg on the highway, while the V8 engine has an EPA rating of 16 mpg in the city and 23 mpg on the highway. The V10 engine has an EPA rating of 14 mpg in the city and 21 mpg on the highway.

Safety features: The Audi A6 2006 comes with a variety of safety features, including antilock brakes, stability control, front-seat side airbags, and full-length side curtain airbags. The car also features an electronic parking brake and a tire pressure monitoring system.

Interior features: The Audi A6 2006 has a well-designed interior with high-quality materials and a comfortable seating arrangement. The car comes with features such as a power sunroof, dual-zone automatic climate control, a 10-speaker audio system, and leather upholstery. The car also features a rearview camera, rear parking sensors, and a navigation system.

Exterior features: The Audi A6 2006 has a sleek and stylish exterior design with a bold front grille and distinctive headlights. The car features 17-inch wheels, fog lights, and a power-adjustable driver's seat. The car also features a remote keyless entry system and power windows and locks.

Maintenance costs: The Audi A6 2006 is a luxury car, and as such, it may require more maintenance than a regular car. Routine maintenance such as oil changes and tire rotations can cost more than a regular car. However, the Audi A6 2006 is known for its reliability, and if properly maintained, it can last for many years.

Resale value: The resale value of the Audi A6 2006 varies depending on the condition of the car, the mileage, and the market demand. According to Kelley Blue Book, the resale value of a 2006 Audi A6 ranges from $3,634 to $6,880.

Warranty: The Audi A6 2006 comes with a four-year/50,000-mile basic warranty and a four-year/50,000-mile powertrain warranty. The car also comes with a 12-year/unlimited mileage corrosion warranty.

Reliability: The Audi A6 2006 is a reliable car, with a reputation for longevity and durability. However, like any car, the Audi A6 2006 may experience issues over time. Common issues with the Audi A6 2006 include transmission problems, electrical problems, and engine issues.