The first Mercedes-Benz Citaro FuelCELL Hybrid worldwide went into service in Hamburg on 17 August 2011. From left to right: Rainer Bomba, undersecretary at the German ministry of transport; Günter Elste CEO of Hamburger Hochbahn AG; Hartmut Schick head of Daimler Buses; Olaf Scholz, First Mayer of the Free and Hanseatic City of Hamburg.