So, since "discovering" how to turn the display screen off, today I double pushed the starter button to be able to engage the windows without having to turn on the car. I lowered all the windows, made sure the AC was off, the media was off and then turned off the screen. In c. a minute, on the blank screen, I got the warning that the battery is being drained. By WHAT, pray tell? The entire car seems shut down to me. So what was draining the battery? I waited for there to be some indicator that the car automatically turned itself off but nothing signified. When I pushed the on/off button to the media center nothing happened. The car was truly off by then. I still don't have a clue what was "on" in the background, to cause the warning not to run the systems without the engine running.