Originally Posted by jgc4ever
If using the Auxiliary cord (instead of USB), will the iPod still power off on it's own when shutting the Jeep off?
No. The auxiliary cord carries an analog audio signal from iPod to the head unit. There's no control signaling, so the iPod doesn't know anything about what's happening on the other end of the cord.
An iPod Touch doesn't actually power off when connected via USB either. It goes dormant, but it's still alive and drawing down its battery. This won't matter to you if you never remove it from the car, but if you come out to the garage some morning to grab it for a jog, you may be disappointed.