Repair, maintenance and conversion of classic vehicles, in particular of the Opel brand, preparation of vehicles for racing track operation, in particular of the Opel brand, engine construction, cylinder grinding work, transmission overhauls, transmission repairs, rear axle overhauls, limited slip differential overhauls, carburetor repairs and carburetor adjustments as well as trade in vehicles and vehicle parts; may establish branch offices, participate in other companies or merge with them, as well as acquire, hold and sell real estate and properties.