Is it really a 550i as u have stated? My doubts arise because the 550i comes as the 550i M sport, therefore has the M package as standard. Looking at your car pics, the bumpers and alloys are standard.
For the most top-of-the-line non-M 5 series, i was expecting the car to have wheels larger than 17", as the 550 comes with 18" as standard.
Also from the third picture , the car looks as though it doesnt have HID lights.
These are my observations and correct me if im wrong.
Congratulations on the car.