How do you change fuel filter on 2005 Mercury Grand Marquis?

To change the fuel filter on a 2005 Mercury Grand Marquis, first, relieve the fuel system pressure by removing the fuel pump relay and starting the engine until it stalls. Next, locate the fuel filter, which is typically found along the fuel line under the car, near the fuel tank. Disconnect the fuel lines from the filter using the appropriate tools, replace the old filter with a new one, and reconnect the lines. Finally, reinstall the fuel pump relay, turn the ignition key to the "on" position to prime the fuel system, and check for leaks.