This manual covers the Mercedes-Benz SL-Class, specifically the R230 chassis, produced from 2002 to 2011, with a focus on the 2004 model year. The SL-Class represents a luxury grand tourer and sports roadster, renowned for its sophisticated engineering, powerful V8 engines (including the naturally aspirated 5.0L M113 in the SL500 and the supercharged 5.4L M113 ML in the SL55 AMG), and innovative features such as the retractable Vario-Roof hardtop and the advanced Active Body Control (ABC) suspension. These vehicles were designed for affluent consumers seeking a blend of performance, comfort, and cutting-edge technology, offering a premium driving experience.

This comprehensive service and repair manual provides dealership-level detail across all systems and repairs, from engine mechanicals and fuel systems to the complex Active Body Control suspension, Sensotronic Brake Control (SBC), and the Vario-Roof convertible top mechanism. It includes routine maintenance procedures, detailed troubleshooting guides for common issues like ABC system leaks or SBC unit failures, specific repair procedures with torque specifications, and diagnostic guidance. This manual is an essential resource for owners, mechanics, and technicians to ensure the proper maintenance, diagnosis, and repair of the Mercedes-Benz SL-Class.