From the very beginning the new Citaro NGT fulfils the highest demands, including on its reliability. Development engineers have tested it intensively under the most demanding conditions for three years to ensure this. From winter testing in Scandinavia under hard frost conditions, to gruelling summer tests in Milan and Soelden/Tyrol. In the latter locality the Citaro NGT test was combined with an altitude test at 1600 m above sea level. To cap it all there was an endurance test as well. The tests also placed great demands on logistics, because a supply of natural gas is not ensured at all of the classical test areas. The three test vehicles successfully clocked up a total of around 130,000 km.