Not sure if these items are the culprits, but I have an ipod charger that continually charges the ipod even when car is off. I can't imagine that it would draw that much power out of the battery in one night. Car worked yesterday. The second thing is my rear PDC setup. I'm retrofitting PDC into my 04 X5 and have the rear sensors all connected, but not the front...yet.

Question about jumpstarting. Can you do it via the terminal in engine bay, or does it require opening up the entire trunk floor (total pain in the a$$ and would like to avoid this)?