Battery went dead today on my 2008 Commander with the 4.7 V8. Went to Auto Zone they said the battery was dead. Bought a new one and they offered to change it for free. They hooked up some memory saver (?) device to the computer connection and then changed the battery. When I started the car the gauges won't work, the check engine light is on, door locks don't work, rear a/c won't work and remote is not working. Guy at Auto Zone has no idea why or what they did... Anyone have any idea? Haven't been able to take it to the dealer to have it hooked up to the computer.