The Audi A6 III, known as the third generation (2004–2011) with the internal code Typ C6, marked a major leap forward for Audi's executive sedan. Often referred to as the Audi A6 2004–2011, the sedan debuted in 2004, followed by the Avant wagon and Allroad quattro in 2005. Production wrapped up in 2011, giving way to the fourth-generation C7. In the US, sales kicked off in late 2004, with strong availability through Audi dealers nationwide.
The car rides on the MLB (Modular Longitudinal Platform), introduced with the C6, boosting rigidity, cutting weight, and improving interior space. Signature design cues include the bold Singleframe grille, sharp bi-xenon headlights (optional), and sleek, aerodynamic lines (Cd 0.28). The Audi A6 third generation came in sedan, Avant wagon, Allroad crossover-wagon, and high-performance S6/RS6 variants. Powertrains ranged from 2.0 to 5.2 liters (FSI/TFSI gasoline and TDI diesel), delivering 170–580 hp, with transmissions including manual, Multitronic CVT, or Tiptronic automatic, and front- or quattro all-wheel drive. The cabin featured premium materials, the innovative MMI system, and a strong emphasis on luxury. The Audi A6 review positions it as a top contender in the executive segment for comfort and tech.
What’s New Compared to the Previous Generation
Compared to the second generation (C5, 1997–2004), the Audi A6 III (C6) was an all-new design. The MLB platform replaced the old architecture, stretching the wheelbase by 3.3 inches (to 111.9 in), overall length by 4.7 inches, and width by 1.8 inches for better interior room and stability. Body rigidity increased by 34%, and weight was reduced thanks to aluminum in the suspension and hood.
The exterior received a bold redesign: massive Singleframe grille, optional LED daytime running lights, and a more dynamic profile. Inside, higher-grade materials (leather, wood, aluminum), a redesigned dashboard with color display, and an ergonomic steering wheel elevated the feel. Comfort improved dramatically with superior sound insulation (noise reduced by about 10 dB) and optional adaptive suspension.
Tech upgrades included direct-injection FSI/TFSI engines (e.g., 2.0 TFSI replacing older units), common-rail TDI diesels (up to 15% better efficiency), and an refined 8-stage Multitronic. Safety earned 5-star Euro NCAP ratings, with added side airbags and active head restraints. Overall, the Audi A6 third generation became roomier, more advanced, and more premium-focused, outpacing rivals like the BMW 5 Series in many areas.
US Used Market
In the United States, the Audi A6 2004–2011 remains a sought-after used luxury sedan, especially among buyers wanting executive comfort on a budget. Recent market data shows hundreds of listings nationwide, with imported examples from Europe often in better condition. Avant wagons make up roughly 25–30%, sedans dominate at ~65%, and Allroad models are uncommon but prized.
Current used price range: $6,000 to $14,000 depending on year, mileage (typically 120,000–250,000 miles), condition, and equipment. Average transaction price hovers around $9,000–$11,000. Early 2004–2006 models often fall in the $6,000–$9,000 bracket, while well-kept 2009–2011 examples with lower miles can reach $11,000–$14,000. Prices remain fairly stable with minor seasonal fluctuations. Approximate market price in the United States – most in-demand are 3.0 TDI / 3.2 FSI models with Tiptronic and quattro. Demand stays solid in major metro areas like Los Angeles, New York, and Chicago, where the A6 is valued for its prestige and highway manners. The Audi A6 review often positions it as a smart alternative to a used Mercedes E-Class with strong resale traits.
Main Trims and Variants Available in the US Market
In the US, the Audi A6 III was offered in trims tailored to American preferences, with emphasis on comfort, tech, and all-weather capability. Common packages included Premium, Premium Plus, and Prestige (later years), plus S line sport packages.
Premium (base): leatherette or cloth seats, dual-zone climate control, premium audio with 10 speakers, 17-inch wheels, ABS, stability control, multiple airbags. Used prices typically $6,000–$9,000.
Premium Plus: full leather interior, heated seats, navigation option, xenon headlights, parking sensors, upgraded wheels. Popular choice, usually $8,000–$11,000.
Prestige / S line: sport-tuned suspension, S line body kit, premium Bose audio, adaptive headlights, quattro standard on many, advanced MMI. Command higher prices, $10,000–$14,000.
Engines commonly seen: 3.2 FSI V6 gasoline and later 3.0 TFSI; diesels less common in US but some gray-market imports exist. Many feature the ZF 6-speed Tiptronic automatic.
| Trim Level | Key Features | Approximate Used Price (USD) |
| Premium | Leatherette, climate control, 17" wheels | $6,000–$9,000 |
| Premium Plus | Leather, xenon, navigation option | $8,000–$11,000 |
| Prestige / S line | S line styling, Bose audio, quattro | $10,000–$14,000 |
Final Thoughts
The Audi A6 III works well in the US as a versatile luxury car for commuting, family duties, or long highway trips. Spacious cabin (seats five comfortably) and trunk (up to 1,000+ liters with seats folded in the Avant); in city driving it offers nimble handling and decent efficiency; for weekend escapes, quattro and raised Allroad versions handle light off-road duties. Strengths include premium build quality at accessible used prices, solid longevity (many exceed 250,000 miles with care), and timeless status. Compared to rivals, the A6 delivers superior ride comfort and all-wheel-drive confidence.
When shopping used, check service history (ideally original records), engine condition (FSI carbon buildup, oil consumption), suspension wear, rust (undercarriage in salt-belt states), verified mileage (Carfax/VIN), and air suspension if equipped. A pre-purchase inspection by an Audi specialist is highly recommended. Overall, the Audi A6 2004–2011 remains an excellent pick for anyone seeking refined executive luxury without breaking the bank.
