His father owned an auto & moto garage and repair shop "Rosemeyer & Co sur Bahnhofstraße", where young Rosemeyer worked on motorcycles and cars. Having started by racing motorbikes, Rosemeyer became a member of the Auto Union racing team with hardly any experience in racing cars. This was later considered a benefit as he was not yet used to the handling of traditional layout race cars. The Ferdinand Porsche-designed mid-engined Silver Arrows of Auto Union were fast, but hard to drive, and only he, Tazio Nuvolari and to a lesser extent Hans Stuck truly mastered the machines. Rosemeyer was also a very skilled mechanic, so, like Hermann Lang of Mercedes, he was able to give good technical feedback to Dr. Porsche and development engineer Eberan von Eberhorst to further develop the Auto Union cars and set his cars up for races to make them quicker and easier to drive.