Hi,
I presume this is the 1.9TD, 1st Buy decent plugs, its a bitch of a job so you only want to do it once, I bought cheapies which lasted about 6 weeks and then BOSCH. Disconnect battery, The feed wire is held onto each plug with an 8mm nut, first remove this on each, then the plug itself is 12mm, you will need both a deep socket and a ring spanner with a good "throw". No's 1 and 2 are partly hidden by the injector pump, 3 and 4 by all the rest of the bits. I used a bit of stiff plastic pipe over the threaded end of the heater plug to guide them into Nos 3 &4. 1 and 2 can be put in reasonably easily. The hardest part was putting back the feed wire and 8mm nut, trial and error behind the pump.I think I used 8mm ring and 8mm 1/4 drive socket, 12mm ring and 3/8 deep socket, The plastic pipe was very useful in guiding in the plugs to 3 & 4. An extra joint between wrist and elbow would also be handy!!Have a cold beer waiting, you will need it. Best of luck, Tony :bang: