I was driving my M35 with nav the other day, and when I changed stations on the XM radio, it quit, and a message saying "reloading" appeared on the bottom of the screen. I changed stations again, and still nothing. Turned it off and on and it started working. Nav was working fine.This has happened the last two times that I have driven the car.
Also, right after this happened, the auto door lock/unlock feature quit working. At least I think it quit working. When I start the car and put it in gear, the doors do not auto lock. They also do not auto unlock when I turn off the car. The exit seat and steering wheel positioning works when door is opened.
Checked the manual, and couldn't find anything about this function. As I rarely drive this car, maybe I am wrong about the locks working this way, but I sure think that they did.
Anyway, seems as there has been some sort of a computer glitch somewhere, and I really don't want to have to go back to the dealer, so wonder if anyone here has any ideas as to what the problem could be.
Even when driving under bridges and overpasses (like along the Long Island Parkway in certain places, as I discovered), you sometimes lose the signal for a few minutes.