Mercedes-Benz MB517 engine

The Mercedes-Benz MB 517 was a supercharged, four-stroke, V-12 diesel marine engine, the diesel version of the MB 507 and derived from the MB 503 petrol engine. The MB 507 was in turn based on the Daimler-Benz DB 603 inverted V-12 aircraft engine and shared its bore, stroke and displacement. Unlike the petrol-powered MB 503, the diesel MB 507 did not use a supercharger. The MB 517 was one of the two powerplants chosen for the Panzer VIII Maus super-heavy tank, alongside the MB 509 petrol engine, and the Maus V2 is listed as its application.