 Complete the following phrase:  Attractive as the Monza was, its streamlined body was really only suited to high-speed tracks made up of straights and slow corners, leading to defeat at its second race, the British Grand Prix at the high-speed corner dominated Silverstone circuit, where Fangio hit a number of oil barrels that marked out the circuit. A conventional open-wheel-version was introduced for the most important race on the calendar for Mercedes, the German Grand Prix at the twisty and long Nürburgring. Fangio, who had already won the first two GPs of 1954 with a Maserati in his home city of Buenos Aires and at Spa, won this and the two following GPs in 