This comprehensive service and repair manual for the Audi A6, S6, and RS6 (1999) models, covering chassis codes 4B, 4B2, 4B4, 4B5, 4B6, and 4BH, provides detailed instructions and technical specifications for every aspect of your vehicle. From general information, including accessories and equipment, to intricate systems such as audio, visual, and telematics, brakes, driveline axles, electrical components, lights, restraints, steering, suspension, body and frame, interior and exterior, mechanical engine, transmission, tires and wheels, HVAC, and wiring diagrams, this manual is your ultimate resource for maintenance and repair. With its detailed explanations and clear diagrams, this manual empowers you to confidently address any maintenance or repair needs.

The Audi A6, S6, and RS6 models from the 1999 model year (codenamed 4B) represent a significant leap forward for the German automaker, marking the transition from the C4 generation to the all-new C5 platform. These vehicles offered a compelling blend of luxury, performance, and engineering innovation, establishing themselves as strong contenders in the premium sedan and wagon segments. The A6 offered a diverse range of engine options, catering to various needs, while the S6 and RS6 focused on delivering exhilarating performance. The S6, powered by a 4.2-liter V8 engine, delivered a significant power boost over the standard A6, while the RS6, with its 4.2-liter twin-turbocharged V8, aimed to push the boundaries of performance and became a true icon for its time.

The 4B platform for the A6, S6, and RS6 featured a number of notable advancements. A stiffer chassis, improved suspension, and advanced quattro all-wheel drive system significantly enhanced handling and driving dynamics. The interior featured an upscale and ergonomic design, highlighting the brand's focus on comfort and driver-centric features. The A6 lineup offered a range of body styles, including sedan, Avant (wagon), and even a convertible option. These vehicles were known for their reliability and durability, showcasing the engineering prowess of Audi. The 4B generation of Audi A6, S6, and RS6 vehicles remains a popular choice for enthusiasts and drivers seeking a blend of luxury, performance, and practicality. Their timeless design and robust engineering have ensured they continue to be highly sought after on the classic car market.