In the looks, the S-Class is refreshed with new headlights that are sharper looking, and feature LED daytime lights around the light bulb. At the back, new LED taillights are settle in with all-new squared-out exhaust pipes. Inside, the interior remains as the previous model, with a few tweaks in the instrument cluster, and a new steering wheel.
Engine line-up also remains with a V6, V8 and V12 engines. However, the big news this year for the S-Class, the is introduction of the S400 BlueHYBRID model. Yes, Mercedes' biggest car is now a hybrid as well. The S400 borrows a 3.5L V6 from the S350 model, and installs an electric battery-powered motor that adds 20 hp and 88 lb-ft of torque to the original V6. So overall power, this hybrid system generates a total output of 299 hp and 283 lb-ft of torque combined engines. Connected to a 7-speed automatic, the S400 will consume on an average of 30 mpg of fuel economy. It's clever too.
The S400 BuleHYBRID model has all the regulations as any hybrid would. Such as stop function and regenerative braking. And because Mercedes' engineers don't want any of the trunk space shrunk, they made the battery electric motor small enough to make it fit next to the engine upfront. The M-B S400 BlueHYBRID will be available in Europe this summer of 2009.
Source : [Mercedes-Benz]