Otto Wilhelm Rudolf Caracciola was a German racing driver. He won the European Drivers' Championship, the pre-1950 equivalent of the modern Formula One World Championship, an unsurpassed three times. He also won the European Hillclimbing Championship three times – twice in sports cars, and once in Grand Prix cars. Caracciola raced for Mercedes-Benz during their original dominating Silver Arrows period, named after the silver colour of the cars, and set speed records for the firm. He was affectionately dubbed Caratsch by the German public, and was known by the title of Regenmeister, or "Rainmaster", for his prowess in wet conditions.

Silver Arrows is a nickname typically given to silver racing cars with a significant connection to a German car manufacturer. Although the term was coined in 1932, it came into popular usage regarding Germany's dominant Mercedes-Benz and Auto Union Grand Prix motor racing cars between 1934 and 1939. The name was later applied to the Mercedes-Benz Formula One and sports cars in 1954 and 1955, then to the Sauber Group C prototype racing sports cars that raced at Le Mans in the late 1980s as well as the McLaren-Mercedes Formula One cars of the late 1990s and 2000s, and is currently applied to the Mercedes-AMG Petronas F1 cars from 2010 to present.