The moderately streamlined body was designed by technical director Karl Jenschke (1899-1969) and was manufactured by Gläser-Karosserie GmbH in Dresden.

The 120 series cars were equipped with a six-cylinder in-line engine (as opposed to the four-cylinder Steyr 100) driving the rear wheels via a four-speed transmission.

The 1936 model changes included a wider axle track and a bigger engine even though the power remained at 50 PS (37 kW).

Given the car's lightweight and rigid chassis with four-wheel independent suspension, its performance and handling would have been exceptional for the day.

During the Second World War this model, especially in a cabriolet version was designed primarily for Nazi Germany's high rank commanders and officers.