This comprehensive Audi A6 C5 S6 RS6 & Allroad Quattro Workshop Manual covers all variations of the 2003 model year, including Allroad, Quattro, S6 and Avant editions. It provides detailed instructions and information for servicing, repairing and maintaining your vehicle to the same standard as professional mechanics. The manual encompasses a full maintenance manual, a complete wiring manual, and an extensive workshop manual, totaling approximately 10,000 pages. Each section is fully bookmarked for easy navigation, allowing you to quickly find the specific information you need. The manual covers every engine and variation, including petrol and diesel engines, as well as manual and automatic transmissions. Each system has a dedicated section, ensuring comprehensive coverage. The manual offers detailed instructions on a wide range of topics, including: * **Service Information:** Provides guidance on routine maintenance schedules and procedures. * **Identification Codes:** Assists in identifying specific vehicle components and systems. * **Jacking and Lifting:** Covers safe and proper procedures for lifting the vehicle. * **Noise Vibration and Harshness:** Addresses troubleshooting and repair techniques for noise and vibration issues. * **Suspension:** Includes detailed information on suspension components, adjustments, and repairs. * **Wheels and Tyres:** Covers wheel and tire specifications, maintenance, and repairs. * **Driveline System:** Explains the operation and repair of the driveline, including driveshafts and bearings. * **Brake System:** Provides guidance on brake system components, diagnosis, and repair. * **Anti-Lock Control:** Covers the operation and troubleshooting of the anti-lock braking system. * **Steering System:** Includes information on steering components, adjustments, and repairs. * **Engine System:** Covers the engine's operation, maintenance, and repair. * **Fuel Charging and Controls:** Provides detailed information on fuel system components and operation. * **Accessory Drive:** Explains the operation and maintenance of engine accessories. * **Starting System:** Covers the components and troubleshooting of the starting system. * **Engine Ignition:** Explains the operation and maintenance of the ignition system. * **Engine Emission Control:** Provides information on emissions control systems and their components. * **Intake Air Distribution:** Covers the operation and maintenance of the intake air system. * **Emissions:** Includes instructions for emission testing and repair. * **Electronic Engine Controls:** Explains the operation and troubleshooting of electronic engine control systems. * **Manual Transmission:** Covers the operation, maintenance, and repair of manual transmissions. * **Clutch Controls:** Provides instructions for diagnosing and repairing clutch problems. * **Exhaust System:** Includes information on exhaust system components, maintenance, and repairs. * **Fuel System:** Covers fuel system components, operation, and troubleshooting. * **Acceleration Control:** Explains the operation and maintenance of the acceleration control system. * **Speed Control:** Includes information on cruise control systems and their components. * **Climate Control System:** Covers the operation, maintenance, and repair of the climate control system. * **Air Distribution:** Explains the operation and troubleshooting of the air distribution system. * **Control Components:** Provides information on climate control system components and their functions. * **Instrument and Warning Systems:** Covers the operation and troubleshooting of vehicle gauges and warning systems. * **Battery and Charging System:** Includes information on the battery, charging system, and related components. * **Information and Entertainment Systems:** Covers the operation and troubleshooting of the vehicle's infotainment system. * **Lighting:** Provides detailed information on lighting systems, components, and repairs. * **Electrical Distribution:** Explains the operation and troubleshooting of the vehicle's electrical system. * **Electronic Feature Group:** Covers the operation and troubleshooting of various electronic features. * **Body System:** Includes information on body panels, interior trim, mirrors, seating, glass, frames, mechanisms, instrument panel and console, wipers and washers, roof, bumpers, safety belt system, and body repairs. * **Metal Repairs:** Provides guidance on metal repair techniques for body work. * **Subframe and Mounting System:** Covers the subframe and mounting system components, adjustments, and repairs. This comprehensive manual is written in a style typical of dealer-level factory manuals, providing detailed information and clear instructions to help you service and repair your vehicle effectively.

The Audi A6 C5, launched in 1997, marked a significant shift for the brand, moving towards a more premium and technologically advanced approach. This generation, spanning from 1997 to 2004, solidified the A6's reputation as a strong contender in the executive sedan segment. The A6 C5, available in various body styles including sedan, Avant (wagon), and Allroad Quattro (crossover), offered a range of engines, including gasoline and diesel options, catering to different performance and fuel efficiency preferences. The flagship S6 and RS6 models, with their powerful V8 and V10 engines, pushed the performance boundaries, offering a compelling blend of luxury and athleticism. The Allroad Quattro, introduced in 1999, took the A6's versatility to a new level. This model combined the A6's elegant styling with rugged off-road capabilities, thanks to its raised suspension, advanced quattro all-wheel drive system, and a robust underbody protection. The Allroad Quattro catered to an audience seeking a comfortable and capable vehicle for both urban driving and venturing off the beaten path. The A6 C5, across its various trims, became known for its elegant design, spacious interior, and advanced technology features. Whether as a sophisticated daily driver or a versatile adventure companion, the A6 C5 offered a compelling combination of luxury, performance, and practicality.