To change the filter element on Mitsubishi Pajero 3 with a diesel engine, perform the following:
1) Turn off the fuel cap.
2) Disconnect the connector from the filter and the fuel hose.
3) Disconnect the water sensor bracket in the fuel.
4) Remove the fuel filter assembly.
5) Remove the water sensor.
6) Turn off the fuel filter cartridge and remove it from the fuel pumping a hand pump.
7) Put the new filter element and collect it back.
8) Remove the air from the system.