My '02 Punto JTD needs a new fuel filter, and I could do with some easy to follow instructions. The latest Haynes manual doesn't include diesels. Maybe not enough people buying them which is a shame as they're brilliant. I'm a bit reluctant to just unscrew the fuel filter and shove on a new one in case of introducing air into the system, and there's no obvious way to bleed it. On my old Peugeot 405 diesel there was a handy squeezable rubber bulb in the fuel line so bleeding the system was a doddle after changing the fuel filter, but no such luck on the Punto. All advice gratefully received.