Better start thinking of a VERY good reason/excuse as to why those wires would be crossed.
Maybe something along the lines of you lent your car to a mechanic friend for a week, and am not sure what he might of tried to do, but you never messed with the car at all.
The dealership and SA "MAY" believe that and fix the crossed wire and let it fly. But you better be damn good at lying and have a very understanding/gullible SA.
PnP upgrade a couple hundred bucks. Voided BMW powertrain warranty potentially thousands of dollars. Triple checking wiring job and test driving well before you take car into dealer, priceless!
now you just need to change your screen name from yeefoo335 to youfool335