LOS ANGELES, California - For more than two years Hollywood stars Diane Kruger and Joshua Jackson have been driving a Mercede B-Class F-Cell, a hydrogen-powered car that produces water vapour instead of C02 and other noxious stuff at its exhaust.Now the couple have produced a film to show the potential of the fuel-cell drive during a trip through California's Death Valley, one of the driest and hottest places on Earth.IMAGE GALLERY: Defying Death ValleyVIDEO: Defying Death ValleyIn ‘Defying Death Valley’ they drove in temperatures reaching 50C but didn't take any bottled water. Instead, they carried a reception tank to collect the condensing water vapour from the exhaust pipe. It was used for cooking and drinking.Mercedes' global communications Madeleine Herdlitschka explained: "The B-Class F-Cell emits about nine litres of water vapour per kilogram of hydrogen used while driving. The car has a hydrogen capacity of about 3.7kg, sufficient for 400km."Kruger said: "We've become absolute fans of the fuel cell. The car is so easy to use. On a day-to-day basis our normal mobility isn't restricted at all - and we had no water problems in Death Valley."FIRST IN SERIES PRODUCTIONJackson added: "It takes three minutes to fill, drives about 400km and gives off zero emissions - simply perfect." About 200 have been sold in the US and Europe since 2010, one of which claims to have covered 315 000km. This B-Class is Merc’s first fuel-cell electric vehicle in series production. Electricity is generated by the chemical reaction of hydrogen and oxygen.During the 2011 Mercedes-Benz F-Cell World Drive, three B-Class F-Cell vehicles took 125 days to drive 30 000 km through 14 countries and across four continents. Jackson was one of the drivers.Since 2001, Mercedes has created for testing 200 B-Class and 60 A-Class F-Cell vehicles as well as three hybrid Sprinter vans and almost 60 buses. They have in total covered about nine million kilometres. In 2013, in a bid to speedwidespread market availability of F-Cell vehicles, Daimler, Ford and Nissan reached a co-operation agreement covering the joint development of a fuel-cell system. The intent is to introduce a competitive fuel-cell vehicle by 2017. Daimler hopes to expand Germany’s current network of 15 hydrogen filling stations to about 400 by 2023.