I finally pulled the struck CD out by opening the MKIII unit. However the unit's power never came back. I searched an answer from the forum. I guessed my MKIII unit was long gone earlier because the "power" indicator from the front panel was never showing "orange" color light again as soon as the disk struck inside. On the other hand, "Eject" light would still come on once in a while. That meant it still has power. I just do not get it.

How can an update disk will fry a fancy/expensive Navigation unit so easily? I am a highly skilled IT pro. I just can not imagine BMW will use such a lousy NAV unit for their pricy car. No way for me to buy another MK3 or MK4 unit. It is so fragile. :-(