I have a 2005 BMW 325i and the key unlock and lock does not work, unless I do it from the outside. If i take the key OUT of the ignition and open the driver's door, there is a constant beep that occurs even though ALL lights are turned off, and key is NOT inside the ignition. I'm pretty sure it is because of this (the fact that the car thinks that the key is being "left" inside the car,) that the remote lock and unlock functions do not work. EVERYTHING else works (cruise control, wipers, turn signals, steering controls), and I've been told this is NOT a GM5 issue at all. ANY ideas what this could be? the ignition cylinder has also always felt like there was a little more play than there should be (i directly compared it to my father's 2003 3 series). Not sure if that helps. I also know it's not a battery issue as the key has been tested multiple times, and has always given off a frequency, meaning the key is perfectly fine. Thanks in advance!!!!