''The manufacturer says liquid – instead of gaseous - hydrogen will be used as with its higher energy density, the vehicle’s performance is planned to equal that of a comparable conventional diesel truck."
A comparable conventional MB truck presumably, does the driver have a fred flinstone style opening in the floor or pedals to assist hill climbing, is he bolted to the seat so when he encounters the statutory pot hole he isn’t thrown from the seat bringing the vehicle to a shuddering halt ? 
Hows that going to work when there’s no Fred, driverless by next year isn’t that the great replacement plan.