I have a 2008.5 Mz3 with the 6 disk changer and Sirius radio. I started my car about two weeks ago, and the radio came on saying it was updating, and since then, it does not recognize my preset buttons for Satellite. When I press the buttons, they each come up saying "invalid channel". Also, when I turn the car on now, it always defaults to station 30 something, which is like spa music. I can use the knob to retune to the station I want, but it doesn't seem to like the presets or remembering where it was when it was last on. Has anyone else been experiencing this?