The overall shape is like a passat. The back retains the 5-series trunk, but the taillights are wierd. This is going to take a while to get used to. I suppose it will be like the taurus from '96 and we'll view it as an improvement ten years from now. Unfortunately things have to change.
Oh and the 3 series will get the treatment soon. I just wish they would evolve the look like the z3 to the z4.