This comprehensive service and repair manual offers detailed instructions for the Audi A4 RS4 (2004) S4 Avant, covering all models including 8E, 8E2, 8E5, 8EC, and 8ED. Dive deep into the intricacies of your vehicle with this extensive resource, encompassing a vast array of topics. From general information and accessories to complex systems like audio, visual, and telematics, brakes, driveline axles, electrical components, lights, restraints, steering, suspension, body and frame, interior and exterior, mechanical engine, transmission, tire and wheels, HVAC, and wiring diagrams, this manual equips you with the knowledge needed for successful repairs and maintenance. Benefit from detailed instructions and diagrams to confidently tackle any task, ensuring your Audi A4 RS4 S4 Avant performs at its peak.

The Audi A4 RS4 2004 S4 Avant, internally designated as 8E, 8E2, 8E5, 8EC, and 8ED, is a high-performance station wagon variant of the Audi A4 platform. Launched in 2004, it marked the return of the RS4 nameplate after a hiatus of several years. This generation of the RS4 was powered by a naturally aspirated 4.2-liter V8 engine producing 414 hp and 317 lb-ft of torque, figures that propelled the wagon to a top speed electronically limited to 155 mph. This engine was a further development of the 4.2-liter V8 found in the Audi S4, featuring redesigned cylinder heads, an increased compression ratio, and a revised intake system. The RS4 also received a six-speed manual transmission paired with the Quattro all-wheel-drive system, offering a thrilling driving experience. Aesthetically, the RS4 stood out with its aggressive styling, sporting wider fender arches, a unique front and rear bumper design, S-line side skirts, and oval exhaust tips. The interior echoed the exterior's sporting character with S-line sport seats, a three-spoke leather-wrapped steering wheel, and a comprehensive instrument cluster.

Beyond the performance and styling, the RS4 Avant provided a versatile and practical package. The wagon's spacious cargo area, folding rear seats, and overall practicality made it a desirable choice for families and enthusiasts seeking a blend of performance and everyday usability. The RS4 Avant played a crucial role in establishing Audi as a significant player in the high-performance luxury car market. The combination of its potent engine, refined handling, and practical wagon body made it a compelling offering. Its enduring popularity and iconic status, particularly within the Audi enthusiast community, highlight its enduring appeal and significance in the history of the brand. It remains a highly sought-after classic, renowned for its performance, practicality, and timeless design.