I might be mistaken but the E30 has a manual safety hex key feture that can be used in this situation.I am not sure if the E28 has same.Can anyone help?!.The hex key needs to be inserted and rutated in an area that reveals after a round blank plug in the door pan. is removed. Good luck, Dan B Yeserday I rolled my window down, and then it would not go back up. I tried both the front switches and the rear, and fiddled with the child lock just to make sure that was not the problem. What else should I check?