Daimler Buses pursues this course undeterred: it all began in 1997 with the NEBUS research vehicle, the first bus in the world powered by a hybrid drive system, leading to the Citaro G BlueTec Hybrid (diesel-electric hybrid drive) just presented to the public and, in 2009, to the new Citaro FuelCELL Hybrid.
From the autumn, the Mercedes-Benz Bus and Coach unit will subject the bus to stringent Europe-wide large-scale practical service testing in a number of cities (modelled on the successful CUTE fleet trials organised by the European Union between 2003 and 2006). Within the framework of CUTE, the continuation project HyFLEET CUTE, and other affiliated projects, 36 Mercedes-Benz Citaro fuel-cell vehicles have been implemented successfully in twelve transport systems on three continents since 2003. The buses covered more than two million kilometres in around 135,000 operating hours. The environmentally friendly fuel-cell drives demonstrated to great effect their operating suitability.