buy one of your cars.
Friend is a mechanic. Earlier today told me that, beginning in 2013, Chrysler automatic transmissions will have the software that operates them embedded in a module in the transmission itself. And if you disconnect the battery, or it dies on you, you can reconnect it or put in a new one and the engine will start; but until you get it to a Chrysler dealer to have the module reprogrammed, you're not going anywhere.
Just think of all the levels of 'Fail' involved in this.