An anonymous reader writes: For the past several years, Japan has been trying to encourage development of hydrogen fuel cell technology for cars. Now it seems some German manufacturers are getting interested as well. "Audi used last week's North American International Auto Show in Detroit to debut its h-tron Quattro fuel cell SUV concept, and the UK's Autocar is reporting that Mercedes-Benz has green-lit for production a fuel cell version of its GLC SUV." The Audi vehicle has a range of roughly 600km. BMW has been working on this problem too: "For quite a while, the company was experimenting with internal combustion engines that used H2 instead of the traditional hydrocarbon fuel. More recently, it showed us an i8 and 5 Series powered by fuel cells, although neither is set for production."