sorry i didn't see this when it first happened, but i had the same problem. i do have a 7 year old stepdaughter and got her to climb through the ski hole in the back seat and unlock the door. i had already punched out the oblong hole for something else - it has a few spot welds that you have to break, and then it can be pried out. i never tried any of the other solutions offered here, but when i went to the local bmw guy, he was amazed at my simple solution, he says that they usually tow the car, put it up on a lift to get to the battery terminal and jump it.