The 3.2-liter V6 delivers 255 horsepower, the 4.2-liter V8 generates 350 horsepower, and the 5.2-liter V10 in the S6 puts out 435 horsepower. The quattro models feature Audi's all-wheel drive and come with six-speed automatic transmissions.

The A6 3.2 comes loaded with standard features: leather upholstery; wood trim; dual-zone automatic air conditioning with pollen filters; AM/FM/6CD/MP3 with 10 speakers; 12-way power driver's seat with four-way adjustable power lumbar support; split-folding rear seats; tilt/telescoping steering column; leather-wrapped, multi-function steering wheel; leather-wrapped shift knob; trip computer; theft deterrent system; and 16-inch alloy wheels.

Options for 3.2 models include premium leather upholstery ($1,000); power opening and closing rear tailgate ($450); manual rear and side window sunshades ($250); 18-inch alloy wheels with all-season tires ($900); rear side airbags ($350); a DVD-based navigation system ($1,600); Sirius satellite radio ($550); a leather-segmented steering wheel with shift paddles ($690); heated steering wheel ($200). Speical order options for the Avant include adaptive air suspension ($2,300); leather driver's side dashboard ($1,275); front sport seats ($500); and adaptive cruise control ($2,000).

The CVT sedan is also available with 17-inch alloys and all-season tires ($750) or 18-inch high-polished alloys and all-season tires ($1,200). Quattro models also can be ordered with the 18-inch polished alloys ($900). Special order options for the sedan include front sport seats ($500); heated steering wheel ($200); leather driver's side dashboard ($1,275); adaptive air suspension ($2,300); and adaptive cruise control ($2,000).

The S line Package ($2,750) includes sports suspension, 18-inch alloy wheels with all-season tires, gray birch wood trim, S-Line badges, aluminum door sills with S line badge, S-Line front and rear bumpers, headlight washers and a four-spoke multi-function steering wheel with shift paddles. An S line package with 19-inch alloys and performance radials ($3,350) is available on quattro models.

The Premium Package ($1,450) offers a power slide/tilt glass sunroof and heated front seats. The Convenience Package ($2,750) includes bi-xenon headlamps, adaptive headlights, a Bose premium sound system, auto-dimming interior mirror with compass, auto-dimming and electrically folding exterior mirrors, memory for the driver's seat and mirror adjustments, Homelink, a storage package, programmable daytime running lights, and a power tilt and telescoping steering wheel.

The Technology Package ($4,000) includes voice recognition, Advanced Key, a new Advanced Parking System with rearview camera, DVD navigation system, and Sirius satellite radio. A Cold Weather Package ($550) offers heated rear seats, a ski sack and, new for 2007, headlight washers.

The 4.2 quattro adds premium leather, 17-inch wheels, high-intensity headlamps, a power sunroof, upgraded mirrors and upgraded audio to the list of A6 standard equipment. The 4.2 offers similar options to those for the 3.2, but the list also includes a solar sunroof replacing the glass sunroof ($790).

A Warm Weather Package ($1,190) includes a solar sunroof and power rear and manual side sunshades. Stand-alone options: Sirius satellite radio ($550); carbon fiber inlays ($300); adaptive cruise control ($2,000); heated rear seats ($225); and gas guzzler tax ($1,300). Special order options include a normal front seat in Volterra leather; a silver headliner replacing the standard black; and 18-inch alloy wheels with high-performace tires. Also available is a leather dashboard ($1,275).

Safety features include electronic stability program, anti-lock brakes, Electronic Brake-force Distribution, and Brake Assist. Passive safety features include two-stage frontal airbags, side-impact airbags to protect the torso, head airbags to protect the head in a side impact, and active front head airbags to help protect occupants from a collision from behind. A tire-pressure monitor comes standard to alert the driver to an under-inflated tire. Rear side airbags are optional ($350). Quattro all-wheel drive adds to safety, particularly in slippery conditions.