I had a rediculous problem with my intrepid that ended with it having to go to the dealership. It came with an alarm system (which caused more problems than just this). Anyway, while trying to install a new radio the battery somehow died and it was reading as being disconnected. This caused the alarm system to go into some mode which prohibited the car from being started. It had to go to the dealership where they hooked up a computer and had to enter some codes to reset it. I later realized that I had to disconnect the battery to install the radio, but I was informed that even if I had done this the alarm system would have gone into that mode. Meaning that if I had bestbuy do the installation my car would have ended up stuck in their garage. Genius.