The Mercedes-Benz 300 SEL 6.3, built between 1968 and 1972, was the fastest saloon produced in Germany and could also keep up with fast sports cars. It was created by combining the long-wheelbase version of the 300 SE with the engine from the Mercedes 600. 6.3 liters of displacement and 250 hp in combination with the lighter 300 SEL saloon made it possible to achieve outstanding driving performance without sacrificing comfort. This report goes into the history of the development, describes driving impressions and shows the saloon in current and historical pictures, supplemented by original brochures and press information, as well as a sound sample.