This comprehensive parts manual for the Audi A6 C5, covering model years 1998-2004, provides essential information for anyone working on or maintaining this vehicle. It features genuine manufacturer part numbers, detailed diagrams, approximate prices, and estimated labor time for replacing each part. The manual is designed to be a valuable resource for both DIY enthusiasts and professional repair technicians.

The catalog covers a wide range of vehicle components, including air conditioning, heater, ventilation systems, airbags, body panels (bumpers, doors, fenders, hood, roof, etc.), brakes, ABS, convertible top (if applicable), cooling system, radiator, water pump, hoses, dashboard, instrument panel, console, electrical components (alternator, battery, starter, ignition, lights, cruise control, horn, wipers), emission system, exhaust, engine (oil pan, belts, pulleys, mounts, accessories; NOT internal parts), frame, fuel system, interior trim, locks, moldings, paint codes, seats, seat belts, sunroof, suspension, steering, transmission (mounts only), wheels, windows, and glass.

While this manual provides a comprehensive parts catalog, it does not include service or repair information, wiring diagrams, electrical harnesses, detailed information about electrical switches, engine internal parts (cylinder head, engine block, and their components), transmission internals, clutch, or parts specific to right-hand-drive vehicles (such as those sold in the UK) or vehicles sold outside the USA.

The Audi A6 C5, produced from 1998 to 2004, marked a significant step forward for the German automaker, building upon the success of its predecessor while introducing innovative technologies and a more refined design. The C5 generation A6 was available in a variety of body styles, including a sedan, Avant (wagon), and a sleek, sporty "Avant quattro" featuring a distinctive roofline. A defining feature of the C5 A6 was its aluminum-intensive construction, employed for the suspension components and body panels, contributing to a lighter weight and improved handling. This generation also saw the introduction of Audi's iconic "single-frame" grille, a design element that would become synonymous with the brand.

Under the hood, the A6 C5 offered a range of powerful and refined engines, including the 2.4L and 2.8L V6, as well as a 4.2L V8 for the more performance-oriented S6 variant. For those seeking even more power, the 4.2L V8 was also offered in a turbocharged configuration in the high-performance RS6. The A6 C5 was praised for its driving dynamics, offering a comfortable and refined ride while also delivering agile handling and precise steering. Inside, the cabin was characterized by its luxurious appointments, high-quality materials, and technologically advanced features, including an optional navigation system and a Bose sound system. The A6 C5 established itself as a benchmark for luxury and performance in the midsize sedan segment, earning a reputation for its reliability, driving excellence, and sophisticated design.