1. Put the transmission into park, and turn the vehicle off.
2. Disconnect the blue fuel pump relay in the passenger side footwell side panel.

3. Start the vehicle, and when the fuel system depressurizes, the engine will stall. Now turn the vehicle off.
4. Disconnect the Battery
5. Remove the right rear tire, using proper wheel removal procedures outlined in your Land Rover Discovery's owners manual.
6. Using 2 wrenches disconnect the fuel filter. For this step make sure to have towls or a carboard box of newspaper or something to catch spilled fuel (This is normal and unavoidable).

7. After removing the old fuel filter, replace with a new fuel filter, making sure the flow path for the filter is correct and tighten the connections at both ends of the fuel filter.

8. Wash hands
9. Reconnect the Fuel Pump Relay
10. Reconnect the Battery
11. Start the Vehicle, and check for leaks at the fuel filter.
12. If all is well refit the wheel, lower the rear end, and your good to go!