Mercedes tests its fuel-cell powered B-Class with a trip around the world before the car comes onto the market this summer. Three F-Cell B-Class Mercedes are proving they are tough enough for daily use by making a 30 thousand kilometer journey across four continents and 14 countries. Their tour is expected to end in Stuttgart, just in time for their introduction to the market. drive it! joins these alternative energy driven cars on the first part of their world tour.