Test drive on the highway * During 1939, the Schlörwagen was put through its paces in a series of tests conducted on the recently completed highway near Göttingen, the forerunner of today’s A7. The production car on which it was based, a Mercedes 170 H, achieved a maximum speed of around 105 kilometres per hour, while the aerodynamic version recorded a remarkable 134 to 136 kilometres per hour. The Schlörwagen consumed eight litres of fuel to drive 100 kilometres, while the production car used 10 to 12 litres – equivalent to a reduction of between roughly 20 and 35 percent.