When the level of soot in the filter reaches around 45%, the ECU will make small adjustments to the fuel injection timing and increases the exhaust gas temperature. The optimum temperature required for particle combustion is 600°C. Active regeneration normally occurs around every 450 miles, but it does depend on how the vehicle is driven.
to replace fuel filter you need to disconnect fuel lines from the filter. There will be 3 lines (incoming outgoing and overflow/returning line)On the filter
uSHjli.ford mondeo fuel filter location
