hey i got a 2004 M3 convertible, and last night i put my top up. Ok after a couple of hours i was going out and decided to drop it down butttttttt when i pushed the button the light came up(red) that usualy is up till the mechanism is doing its thing but the top was not moving anywhere. I stop and start the car again to make sure that it charged the pump or whatever it is to make sure got power but still nothing moved. Now i'm going to disconnect the (+) wire from my battery maybe it will reset something or whatever i know sometimes this works. But hey if anyone got same problem and figure out what was it i would more than happy to hear from u. thanks
ps. i did try to reset things it didn't work. next step check the fuses...
Update: Fuses were fine, so next step is the dealer
