Hi Andrew, your symtoms are exactly what I had on my 2004 dci 28kmiles. I changed the fuel filter on my 2 weeks ago now and "touch wood" seems to have cured it.
the fuel filter is attached to the bulk head behind th engine, just to the right if looking from the fron of the car. It has a metal "shield" around it which it make it a little more awkward than it really should be! I undone the 2 bolts holding the bracket/shield to the bulk head. then I twisted the whole lot over so that I could unscrew the filter from the bottom of the bracket. Prob not the "correct" way but worked for me!
ENSURE you fill the new filter with diesel before you screw it in, then you need to prime the filter with the pumpy thing on top oh the housing, otherwise the engine WILL NOT start!
hope this helps a bit!
edit, dont forget to swap the drain bit over with the new O ring!
the fuel filter is attached to the bulk head behind th engine, just to the right if looking from the fron of the car. It has a metal "shield" around it which it make it a little more awkward than it really should be! I undone the 2 bolts holding the bracket/shield to the bulk head. then I twisted the whole lot over so that I could unscrew the filter from the bottom of the bracket. Prob not the "correct" way but worked for me!
ENSURE you fill the new filter with diesel before you screw it in, then you need to prime the filter with the pumpy thing on top oh the housing, otherwise the engine WILL NOT start!
hope this helps a bit!
edit, dont forget to swap the drain bit over with the new O ring!