That's strange, like you say it might be the sunroof. My dealer originally said build week 18 when I first ordered but called the following day to say it was provisionally week 12...apparently they moved things around?? I think I may have been given someone's cancelled order allocation. I must admit I didn't want the car until Aug/Sept but after reading about a 6 month waiting list I decided not to waste anymore time. I am a little worried after reading a few posts on here about cars sitting in final assembly for weeks! I wonder if this is something to do with the apparent shortage of xenons.