The dealer can, with a few calls to BMW, not only locate the car,
but what slot in a lot its filling and why, and when it will be on his lot.
(every car has a bar code . . . . and every bar code has a location.)
Press the dealer to make those calls and you will wait there.
Hell, tell him you can't leave without a good answer, as your
wife is home with a pair of scissors ! . . . . . . waiting