In 1934, the new weight regulation became effective in the former World Cup, the so-called "750 kg formula". This weight of vehicles without gasoline, oil, coolant and tires should not be exceeded.
When the mechanics of DaimlerBenz push the W25 on the scales on the eve of the race, this showed 751 kilograms - 1 kilo too heavy. "Let's come up with one of your famous tricks," said the driver Manfred von Brauchitsch to team principal Alfred Neubauer, "otherwise we are the losers." Neubauer instructed his mechanics to grind the white paint and the spatula off the aluminium autobody in the garages of the forest house "St. Hubertus "in Nürburg at night.
The grinding not only saved the one kilogram, but was also the birth of the silver arrows, as the sanded aluminum shone silvery in the sun. Manfred von Brauchitsch confidently won the "Eifel race" in front of Hans Stuck on Autounion.