The Mercedes-Benz 300 SLR is one of the most iconic designs of the automobile industry. With its gullwing doors and racing palmares the SLR earns a special place in any petrolhead's heart. The SLR, which is commonly known as the Uhlenhaut because of Mercedes motorsport chief Rudolf Uhlenhaut, was a race car up until 1955. At this point, the brand from Stuttgart stopped its racing program because of a terrible accident at Le Mans and turned all the chassis into road-going cars. It was the fastest car on the planet and could reach speeds of 290 km/h (180 mph)! It had great handling, was very reliable and had many new innovations such as the lightweight magnesium body and even had an active rear-wing to help under braking. The car won many races like the Mille Miglia or the Targa Florio and was driven by none other than Sir Stirling Moss and Juan Manuel Fangio. But with only nine cars ever produced and only two remaining, it surely is one of the rarest cars in the entire world.