Mercedes-Benz is launching its first passenger car model equipped with a hybrid drive system in summer 2009 - the S 400 BlueHYBRID. The combination of a modified V6 petrol engine and a compact hybrid module makes the S 400 BlueHYBRID the world's most economical luxury saloon with a spark-ignition engine.

http://www.emercedesbenz.com/Sep08/1...fications.html