An added bonus of driving green cars like the Mercedes-Benz Hybrid , beyond not sacrificing space, safety or luxury, is the IRS alternative-powertrain tax credit. The Mercedes-Benz hybrid credit for the S400H is $1150. … Running on compressed hydrogen, the F-CELL boasts an equivalent fuel mileage of 71.3 city-highway combined miles per gallon and water is the F-CELL’s only emission. Bookmark: World Automobiles Add ‘Mercedes-Benz USA Driving the USTA’s Green Mission at …