I think it is a fully loaded high end C-class, could be a C280 or C350. You can see it has the Harmon Kardon speakers and the leather stitching on the door surface.

The 1st thing I noticed in that photo was the shiny E320, looks like you have done a good car wash. The E still looks great next to the much newer C-class. How do they compare in terms of external dimensions?