The 1989 represents a pinnacle of German engineering, embodying the marque's commitment to performance, luxury, and innovation. As a front-engine, rear-wheel-drive grand tourer, it was designed for comfortable high-speed travel, featuring a potent 5.0-liter V8 engine producing 320 horsepower. Its distinctive aerodynamic styling, with integrated bumpers and pop-up headlights, set it apart from contemporary sports cars. The 928's sophisticated transaxle layout, which placed the transmission and differential at the rear, ensured optimal 50/50 weight distribution, contributing to its exceptional handling characteristics. This model, produced in Stuttgart, Germany, continued the legacy of building premium automobiles with a focus on advanced technology and a refined driving experience.

This manual serves as a comprehensive guide for the 1989 S4, covering essential information for owners and technicians. It details general operation, provides a detailed maintenance schedule, and includes a troubleshooting guide for common issues. Extensive technical specifications, including engine, transmission, and chassis data, are presented. The manual also explains the operation of instrumentation, controls, climate control systems, lighting, and the audio system. Safety features, such as the Anti-lock Braking System (ABS) and seatbelt operation, are explained, alongside information on wheels, tires, and towing. Emergency procedures and basic maintenance tasks like oil changes, fluid checks, and fuse replacement are also covered, ensuring the longevity and optimal performance of your vehicle.