The new model was lower, longer, and broader than its predecessor Mercedes-Benz 290 of type W18, the production of which started on 1933.

In 1938 Germany introduced the law for using low octane fuel and it nearly halted the production of sport-type cars.

However, Mercedes-Benz was not prepared to discontinue the production of their highly successful sport-type car model.

Thus the engine of W18 experienced another upgrade - this time round it became 85 mm and its volume increased to reach 3405 cm³.

This version of Mercedes-Benz 320A with its increased engine volume was manufactured until the course of warfare interfered and halted the production of the model in 1942.