In the mid-1930s, engineer Gerhardt Macher from Berlin addressed a critical issue with DKW cars competing in international races. Despite their standard engines having a displacement of just 692 cc, these cars had to compete in the 1.5-litre class. To overcome this disadvantage, Macher designed a unique vehicle featuring dual engines, achieving a combined displacement of 1,384 cc.

The chassis of Macher's car was based on the standard DKW ‘Master Class’ framework, but with significant modifications. He adapted the rear axle to accommodate the second engine while retaining the original engine position at the front. The installation involved turning the cylinder block of the second engine and making necessary adjustments to the starter and alternator. Both engines were driven simultaneously by a unified transmission, gearbox, and accelerator cable.

Macher's innovation included a four-wheel-drive system achieved by replacing the rear axle with a driven front axle. To cool the additional rear engine, he integrated small, stylish air inlets on each side of the car, positioned just behind the front doors. These functional elements were seamlessly incorporated into the car's streamlined design, which emphasized aerodynamic efficiency.

The car featured a distinctive arched windshield made from flexible Plexiglas, an unusual material for the time, which flowed smoothly into the roofline. The overall design of the car was modern and elegant, reflecting Macher’s commitment to contemporary aesthetics.

The only visible marker of Macher's contribution to this vehicle was the elegantly curved ‘GM’ initials on the radiator grille, a subtle nod to its creator. The car was certified by Macher to reach a top speed of 125 km/h with a fuel consumption of 12 litres per 100 kilometers, showcasing both performance and efficiency.