The Audi 100, model generation C4, produced in 1993, represents a refined executive sedan and mid-size luxury sedan. Known for its emphasis on comfort, refinement, and solid build quality, this generation offered sophisticated engineering, including the availability of the renowned Quattro all-wheel-drive system. It was offered as both a four-door sedan and a practical Avant wagon, with engine options including a 2.8-liter V6 and a 2.3-liter five-cylinder, both featuring Bosch Motronic electronic fuel injection. This model competed in a segment with vehicles like the BMW 5 Series and Mercedes-Benz E-Class, striving for a balance of performance, luxury, and enduring design. This comprehensive service and repair manual provides detailed information for the Audi 100 (C4) model. It covers all aspects of maintenance and repair, from routine servicing such as oil changes and filter replacements to in-depth procedures for engine and transmission overhauls. The manual includes diagnostic guidance, electrical system schematics, troubleshooting for common issues like electrical gremlins and suspension wear, and specifications for all major systems including engine, drivetrain, brakes, suspension, steering, and climate control. This resource is designed to assist owners, mechanics, and technicians in effectively maintaining and repairing the vehicle to factory standards.