Mercedes-Benz has created a hybrid version of its luxury S-Class. The Mercedes-Benz S400 BlueHYBRID is the ultimate luxury vehicle for going green. Under the hood, is aÂ 3.5-litre V6 engine and a 15kWÂ electricÂ motor powered by a lithium ion battery. Mercedes-Benz claims the car will get 29.8 miles per gallon and is expected to release in Europe by the end of June 2009. It will hit the U.S. within a year after that.