Whereas the Citaro NGT is refuelled at a public, natural gas filling station nearby during IAA, Linde AG as the partner company for the energy supply of the Citaro FuelCELL Hybrid set up a dedicated, mobile hydrogen filling station at the trade fair grounds.
Both buses have already gained experience in practical application. The Citaro NGT originates from Mercedes-Benz's own fleet and had previously been used as a test vehicle throughout Europe. The Citaro FuelCELL Hybrid has been tried and tested as a long-term trial vehicle in regular-service operation by Hamburger Hochbahn transport company. It will be driven by drivers of Hamburg's transport company during IAA as they are familiar with the special characteristics of fuel cell buses. The Citaro NGT natural gas bus will be driven by drivers from the Üstra transport company based in Hanover, also responsible for organising transfers during the trade fair.