I was adjusting my window

If you had the ignition on while the air bag was disconected the warning light will stay on until reset by a computer, I disconected the 2 sensors under the front passenger seat on my 318i ES when I removed the seat to dry water from the footwell area I had the CD on so the ignition was on, one of the sensors is to do with the air bag, this is called I think an inflight warning light it will not reset I disconected /reconected it several times to no avail, it's only expensive to reset if you let BMW take the ****, ask around you will find a garage that has the leads plugs ect .

more than one plug disconnect or a ground problem