I just bought my first Z4 yesterday - 2003, 3.0 6-speed manual. I love it! However, this morning it started to do something, and I need help. When I pull from a stop in first gear, it emits a single beep, and at the bottom of the left instrument cluster, 'MPH' flashes, along with '5'. It didn't do this on the drive home from the dealer. Any ideas??