Mercedes-Benz Special Trucks and Mörtlbauer Baumaschinen Vertriebs GmbH recently unveiled their hydrogen combustion engine prototypes as part of the 'WaVe' project in Bavaria, Germany. The project, funded by Germany's Federal Ministry for Economic Affairs and Climate Action, aimed to research and develop hydrogen-powered drive systems for special-purpose vehicles. The demonstration of the Unimog test vehicle and crawler showcased their performance in driving and working operations, emphasizing high power output and low emissions. The project, which involved 18 partners, including industry and science collaborators, focused on replacing conventional diesel engines with hydrogen-based systems. Both the Unimog and crawler prototypes were equipped with custom-built components such as hydrogen-compatible intake systems and optimized ignition systems. The prototypes have been in testing for over a year, demonstrating comparable performance to diesel variants in terms of power and torque. The successful collaboration between Mercedes-Benz and Mörtlbauer signifies a significant step towards integrating hydrogen combustion engines in future vehicle production. The prototypes' ability to be easily refueled with gaseous hydrogen and operate reliably with various attachments highlights the practicality and efficiency of hydrogen-powered vehicles for work machines. The project's findings support the notion that hydrogen combustion engines can offer a sustainable solution for reducing emissions in the automotive industry while maintaining high performance standards.