This happened to me and I was close to the dealership so I dropped it off. 9 days later...
They determined the radio needed to be replaced. The SA ordered a new radio and installed it. I went to pick up the car and noticed my Sirius tuner wasn't showing up as an option. Turned around and they said they'd have to program it in. Next day I got a call saying the software version in newly shipping radios isn't compatible with the software version loaded on the car. So they're hoping to either randomly get a radio with an older build date or BMW will issue a new software version. I'm not hopeful that either will happen anytime soon.
2008 BMW 328xi coupe, 6MT
Ordered 7/16/07 | Production Started 8/27 | Production Complete 9/2 | On board COURAGE, departed 9/10 | Arrived SC 9/29 | Arrived CLE 10/6 | Picked up 10/8
1966 Ford Mustang GT, 425hp
2005 Nissan 350Z, StopTech brakes - SOLD | 2002 Acura RSX Type-S - SOLD