Holy Batman, we can judge a car based entirely on one pre-production pricture featured from one single angle!
Looks pretty normal to me. I think the hood must be that shape to cater for the new pedestrian safety laws. Makes it very smooth and so on. It seems like Mercedes is beginning to go for that new headlight look. The CLS started it off a little, then the A and B class, as well as the SLK gave that single lens effect that stretches way back.
I hope they won't keep that look for all of their range in the next few years time, the dual circular headlight look is a bit of a classic and I know some people really like it like that.
The front grill is very CLS like, wide and all that. The bottom portion looks weird. I'm not all too convinced with the way MB is making that second piece around the foglights in most of their new cars. Just unecessary detail IMO. Too bad there's no interior shot.