How do you replace lock actuator on 2005 mercury marquis?

To replace the lock actuator on a 2005 Mercury Marquis, first, remove the door panel by taking out screws and gently prying it off. Disconnect the wiring harness and remove the old actuator by unscrewing it from the door. Install the new actuator in the same position, reconnect the wiring, and reattach the door panel. Finally, test the locks to ensure the new actuator is functioning properly.