The automatic locks on my aero are acting up. When I press the lock button on the key it always beeps correctly but sometimes the locks don't lock/unlock. The lock button inside the car is intermittent as well. any ideas?
Your central door locking controller is on it's way out. It's a black plastic box 4-1/2" x 1-2" x 1", clipped to the upper air duct and (usually) accessible from under the dash on the driver's side. You can either:
1.. Remove the box, open it and re-solder the connections on the circuit board (there's a good description of how to do this somewhere on this forum), or
2..Get a new one. Part number form Eeuroparts is 4102851. They are pricey ($238).