After stiff competition from BMW and Audi Mercedes are revamping their S Class for 2013.

These spy shots have revealed a slightly longer wheelbase along with a longer low slung profile.
Fashion says that it will house an all new LED daytime running lights and indicators.

We expect the nose will follow the SLS styling cues on this model with a broader snout.
As far as power unit we expect the following:- twin turbo 4.6L V8 producing 430 HP, a twin turbo 5.5L V12 delivering 520 HP, and an AMG twin turbo 5.5L V8 getting between 550 HP and 600 HP.

Mercedes’ Head of Research and Development, Dr. Thomas Weber, has previously revealed that the new S-Class will also feature a plug-in variant model based on the 2010 Vision S500 Plug-In Hybrid Concept capable of 70MPG!

We Expect to see the revealed car possibly 2nd quarter 2012