 The Elantra LPI Hybrid delivers a fuel economy rating of and CO2 emissions of 99 g/km to qualify as a Super Ultra Low Emission Vehicle (SULEV).The Mercedes-Benz S400 BlueHybrid was unveiled in the 2009 Chicago Auto Show, and sales began in the U.S. in October 2009.The S400 BlueHybrid is a mild hybrid and the first hybrid car to adopt a lithium ion battery.