Quite possibly a cost option on that vehicle(?) Certainly is here in the UK at 605 GBP (or around 900 USD). I had it on my X6 40d (M perf spec) and it was BMW Option code 220.
It was standard fit on my M50d.
Get your dealer to print you out a spec sheet.
As your car is being built (?) it probably won't be on this database yet
http://www.rubmw.ru/vincode/eng/