With cold weather approaching, I want to go about fixing a minor issue with my X. It's a 2004. Whenever I use the defroseter, the A/C engages (as it should) but it will not disengage after switching off of the defrost mode. The A/C button is not lit up, and pressing it lights it up, and pressing it again turns the light off, but I can still hear the compressor kicking on whenever I turn the fan on. Turning the defroster on with the A/C already on gives me the same symptoms. The only way to turn the compressor off is by turning the car on and off again, and this solution is not very practical when I'm driving. I want to fix this because driving with the A/C on kills my gas mileage and as we all know, we have precious little of that to spare. Does anyone have any experience with this? Is this even intended behavior? Thanks for any help.