 This highly annoyed Mercedes, who had already developed their Mercedes-Benz W125, and resulted in a heated exchange both on and off the racing track between the two companies for the period until World War II.Having obtained state funds, Auto Union bought "Hochleistungs Motor GmbH" and hence the P-Wagen Project for 75,000 "Reichsmark", relocating the company to Chemnitz.As Porsche became more involved with the construction of the Wolfsburg factory, he handed over his racing projects to his son, Ferry.