I have the exact same car which I got 2 weeks ago so would be interested once you take delivery of your car, ifs comes with blind spot assist. My car happens to have it even though I didn't specify the drivers assistance package. Curiously, that is the only bit of the package that seems to be enabled and have found no reason why it is installed.
Of course I'm not complaining as it works very well as I found out last Saturday on the M40 bring ing my daughter back from Uni for their Easter break. But I would be interested to hear if your car has blind spot assist enabled or not.