UnitedPicturesTV has posted a great video explaining how the new Mercedes-Benz S400 BlueHybrid actually works. Besides being the first hybrid Mercedes on the market, the sedan allegedly gets around 30 mpg. It has a 3.5 liter gasoline engine (not sure why they badged it as a S400) coupled with a permanent magnet electric engine with a combined output of 299 horsepower.