Congratulations. Your car is almost exactly like mine down to the interior color and wood option except for fact that I did not order the Ventilated Seats. I think that BMW Dealers are for the most part able to be trusted. When I ordered my X5, I signed a contract with the dealership describing all the costs at delivery from the price of the car down to the NYS DMW fees. This served to protect both the dealer and myself.
I would not worry about any hidden costs. Good Luck.
