I just left the dealership. Pre lci 535i and 550i have both vents.
I have inspected both pre lci and lci. I don't understand why one would have both working vent and one would have one dummy. I took pictures of both vehicles with the window sticker for comparison.
Vehicle 1 535i with one opening
Vehicle 2 with both vents open
I will be back at the dealership Friday and next Wednesday if anyone need me to look at or compare anything else.