Sediment filter, maybe not all perenties have them as I know not all TDi's had them. Mine is located just behind the fuel tank on my FFR, it's a small alloy cup with a plastic type wing nut on the bottom. Don't try undo the wing nut as they can break, instead undo the bolt on top think it was 11mm and should just lower off, clean and rinse with diesel then fill with diesel before replacing.
I've had a few Beers so I hope this makes sence....:D

