Picked up our M3 in August. Because of the difference between what we paid and what we got on the trade-in, we should have been given $1200 at closing. Didn't happen. We were told we would get a check in the mail in thirty days or so. Also . . . didn't happen. Every few weeks, I call or write or talk to someone F2F. And . . . nothing happens. Love the car. Less thrilled about being ripped off in this fashion. Anyone else experience this? Any suggestions as to "leverage points" to get it resolved? Thx