[1] In 1902, German electrical company AEG purchased the coachbuilding branch of Kühlstein, under engineer Joseph Vollmer, renaming it NAG.

The economic situation was so serious, NAG partnered with Brennabor, Lloyd, and Hansa to form GDA (the equivalent of a US trust), to prevent competition from destroying all of them.

It proved successful for NAG, which prospered enough to build the C4b sports variant, designed by chief engineer Christian Riecken (a prewar Minerva racing driver).

In 1926, Protos (which had built the winner of the New York-Paris race) was acquired from Siemens-Schuckert, leading to "a series of dull six-cylinder cars".

"[3] Rather than rely on conventional shaft drive, however, NAG chose to attempt to fit a Voran FWD system (designed by Richard Bussien) to a backbone chassis with independent suspension, which proved too ambitious, and the development costs disastrous.