The Mercedes-Benz B200 Natural Gas Drive is exactly what it sounds like: A B-Class propelled by gas.
Mercedes-Benz SLS AMG, Autopedia
Mercedes-Benz B-Class Electric Drive - 200 km range
Mercedes-Benz B 200 Natural Gas Drive Manual, 156hp, 2013
Mercedes (Page 20)
Mercedes-Benz B-Class Electric Drive is out of juice - CNET
Mercedes-Benz B-Class Electric Drive to debut at Paris Motor Show
2013 Mercedes-Benz B200 Natural Gas Drive to debut at Paris Motor Show
Mercedes-Benz B200 Natural Gas Drive To Make Public Debut in Paris, eMercedesBenz
Mercedes-Benz B200 Natural Gas Drive To Make Public Debut in Paris
Mercedes-Benz B-Class - Wikipedia
Mercedes-Benz B 200 Natural Gas Drive Manual, 156hp, 2013
Mercedes-Benz B-Class (W246) - Wikipedia
Mercedes-Benz B200 Natural Gas Drive To Make Public Debut in Paris
Mercedes-Benz B 200 Natural Gas Drive - the B-Class gets powered by alternative fuel
2013 Mercedes-Benz B200 Natural Gas Drive to debut at Paris Motor Show