This was done on a V6 ASB engine, may differ for 4 cylinder diesels and petrol models. Parts needed Fuel Filter - 4F0-127-435-A Flathead screwdriver VCDS (easiest way of refilling the filter) Some spare diesel (if you don't have VCDS) Start by removing your engine cover Now unclip each clip shown in the picture, the blue arrow points at the metal clip which pulls out (not shown as I had this removed) I advise wearing gloves as there will be some diesel spillage Pic of pipes removed, I also removed the ducting between the MAF and engine for more access, this is held on with 2 jubilee clips Pull the black circle fitting off the filter, also remove the 10mm bolt from the black cylinder also shown in the pic New filter Old filter removed Make sure everything is on tight and the black circle fitting is pushed down tight into the filter Start Up Easiest way of doing this is through VCDS, go into Engine - Output Tests and look for the below, let this run for 30-45secs. Engine should fire. If not, prime it again For reference, I tried to start the car with the empty filter, this is what (didn't!) happen. The car eventually will start if doing it this way although it will be sore on your starter motor and battery so I recommend either filling the new filter with diesel manually or doing the VCDS output test. You will also get a EML and engine fault code if you try to start it. Code: Address 01: Engine Labels: Redir Fail! Control Module Part Number: 4F9 910 401 HW: 4F0 907 401 C Component and/or Version: 3.0L V6TDI G000AG 0020 Software Coding: 0011372 Work Shop Code: WSC 02334 785 00200 VCID: E2CF52463D8F1D0E6D3-80B7 1 Faults Found: 004195 - Fuel Pressure Regulation P1063 - 010 - Control Range Not Reached - MIL ON Freeze Frame: Fault Status: 11111010 Fault Priority: 0 Fault Frequency: 1 Reset counter: 255 Mileage: 172355 km Time Indication: 0 Date: 2014.08.03 Time: 19:46:29 Freeze Frame: RPM: 840 /min Torque: 117.0 Nm (no units): 17.0 Voltage: 13.45 V Pressure: 92.3 bar Duty Cycle: 31.6 % Readiness: 0 0 0 0 0 Easy!!