Ehrhardt was a German automobile manufacturer founded in 1904 by Heinrich Ehrhardt in Düsseldorf. Prior to establishing his own company, Ehrhardt had been involved with Fahrzeugfabrik Eisenach AG. The new factory was initially managed by his son, Gustav Ehrhardt. The early models produced by the company were based on designs from the French manufacturer Decauville and were sometimes marketed as Ehrhardt-Decauvilles. In 1905, Ehrhardt introduced…