I was wondering if it might be a good idea to completely shut down the car periodically. If we think about the X as a big computer, wouldn't it make sense to reboot either on a daily basis or a weekly basis so that the "system" doesn't get bogged down? I'm not very technical, but I do notice that when my PC/mac has been up and running for awhile, it slows down quite a bit. Not sure if this is comparing apples to apples. Just a thought.