UPDATE!!! I took the car in to have the transmission main seal (torque converter seal) replaced, and they disconnected the battery.. for a week or so while the transmission was out, parts were ordered, etc. When I picked it up last Monday...SURPRISE ...date, time, temp, and even compass arrow and directions were displaying on the dash!!!! The maps aren't up to date, but I'm not ready for that expense, and there really isn't anywhere I travel that I don't already know or have directions.
All that being said -- disconnect the battery for a day and see what happens when you reconnect it.
I've traveled all over the world, and nothing opens the door to conversation faster than saying "I have a Porsche"