Hi all im Davey, I'm looking for some advice! I bought a 2005 407SE 2.0HDI about two weeks ago. Problem is the evening of the day i bought it I got warning ref:- Presence of water in the diesel fuel filter! I was quick on the phone to the used car dealer i bought the car from and it was arranged that the fuel filter would be changed. I'm still getting the Presence of water in diesel fuel filter. The car has also been to a Peugeot Dealer for a ecu and bis reprogram and had a diagnostic test to which no problems where found! Peugeot dealer said they have no idea why the light is coming on as they said it shouldn't be! This is my first ever diesel car so i'm concerned if i keep driving it, I will be wrecking the engine! Any advice would be greatly appreciated David.