The 2010 Mercedes-Benz
CLS is undergoing testing, and as is true with so many segment-defining vehicles, there doesn't look to be much of a change going on up top. However, down below, in the area covered by cladding, we will probably see some noticeable tweaks and refinements as the original "four-door coupe" moves from the current E-Class
to the new E-Class platform (it will not be built on the S-Class
platform). As for engines, in addition to gas and (in Europe) diesel
options, it will be offered with the BlueHybrid drivetrain from the S400.
In the mean time, for 2009, the CLS gets revised front and rear, a new grille, larger outside mirrors, and LEDs in the tail-lamp clusters. Inside, a new steering wheel complements the reworked interior and a next-generation COMAND system.
[Source: Next Autos