1934: W 25 – the legend of the Silver Arrows is born
Even though the large supercharged Mercedes cars scored victory after victory, their time seemed to be running out. As early as 1932, the international motor-racing authority AIACR decided to introduce the 750 kg formula (weight without fuel, oil, coolants and tyres). This weight limit was not to be exceeded. For reasons of safety, officials intended to ban the ever larger, ever more powerful and ever heavier cars from the racetracks. This was because their handling had become difficult, especially with regard to brakes and tyres.
The new weight formula came into force in 1934. In spite of the economic crisis, which affected all motor manufacturers, Daimler-Benz developed the W 25 – a car that later took on a legendary status – to comply with the formula. The W 25's eight-cylinder in-line engine with supercharger and four-valve technology developed 314 hp from a displacement of 3.36 litres. Other progressive features included the chassis with independent wheel suspension all round and hydraulically operated drum brakes.
The legend of the Silver Arrows was created on the Nürburgring in the W 25's very first race staged according to the 750 kg formula. Despite introducing a systematic lightweight design, the car's weight was still one kilogramme over the limit. During the night before the race on 3 June 1934, after it seemed impossible to incorporate technical modifications, race organiser Alfred Neubauer made a courageous decision that created the legend of the Silver Arrows. He instructed his mechanics to scrape off the white coat of paint from the aluminium bodywork overnight. This unusual measure not only yielded the desired weight reduction but also guaranteed a spectacular appearance for Mercedes cars that had previously always appeared in white livery. Manfred von Brauchitsch won the Eifel Race in record time. A few years later, the German press invented the legendary name "Silver Arrow" for the Mercedes racing cars.