I own an X 5 2001, 4.4i V8.... The car has died upon me recently. I've noticed alternating problems with windows activating themselves and rolling down when driving, sprinkler systems working sporadically, air conditioning system not working for day's and suddenly working perfect. Central locking system sticking asif not enough power was getting to the locking mechanis to open and close the car. I've noticed upon returning to the vehicle the central locking system had somehow unlocked the car. Though I was going mad at one stage, but I haev confirmed this as actually happening. I was about to seek the services of a young priest and an old priest(exorcism). SO you are all not alone and I'm about to delve in to the unknown ina bid to get the problems sorted.... Thank you for all your posts... hope this helps to confirm what we alreasy know...