I've driven my colleagues C350e a few times now and the power is great! the initial pull in Sport+ mode is ridiculous! 0-60 is around 5.7 I believe - not too shabby at all I reckon it's not a bad looker either, and inside, it's a world of tech. Not sure I would seriously consider one if it was an option, as I'm still not convinced that I'm ready for a Merc estate just yet, but definitely worth a look-see if you're in that market .
One weird thing though - the heated seats are on by default if it's cold outside... but it doesn't use the seatbelt sensor to switch off the passenger one when there's no passenger... and you can't turn it off from the driver's side (unless you have long arms!) Probably only a minor gripe, but I just find it a bit odd!