Germany will become the first country completely accessible to fuel cell vehicles in 2015, when carmaker Daimler and the Linde technology group will build 20 new hydrogen filling stations.

The result will quadruple the number of public stations available and make it possible for a fuel cell vehicle to reach any location in the country.

"The time is ripe for electric vehicles powered by fuel cells, and we must now address the subject of the relevant infrastructure," said Dieter Zetsche, Daimler's chairman and the director of its Mercedes-Benz Cars unit. "Car drivers can only benefit from the advantages of technology if there are enough hydrogen filling stations available: long ranges, short refueling times and no local emissions."

"The difference is the silence while you drive; you hear almost nothing from the engine," Brock said. "It also has very powerful acceleration because you have high torque from the beginning. It's very fun driving it."

Daimler won't reveal exactly how much the B-Class F-CELL costs, but industry analysts generally say a fuel cell car costs about $100,000 today.

The cars are currently leased by manufacturers at a loss to build public awareness of the technology and to test performance. By 2015, carmakers hope to be able to reduce costs to about $50,000 per vehicle.

The most aggressive is Hyundai, which plans to build 1,000 fuel cell cars already next year and 10,000 per year by 2015.

Toyota, Nissan and General Motors​ have also said they aim to have fuel cell cars for sale to the general public by 2015.