DEUTZ AG engages in the development, design, manufacture, distribution, and servicing of diesel engines for professional applications. It operates through the following segments: DEUTZ Compact Engines and DEUTZ Customized Solutions. The DEUTZ Compact Engines segment comprises of water-cooled and oil-cooled diesel engines with capacities of up to eight liters. The DEUTZ Customized Solutions segment specializes in air-cooled engines and large liquid-cooled engines with capacities of more than eight liters. The company was founded by Eugen Langen and Nicolaus August Otto on March 31, 1864 and is headquartered in Cologne, Germany.