Hi, Just to add to Nev's post as some good info in there, yes assuming Diesel it's listed at 20k km, HOWEVER I'd really recommend yearly. The junk the filters have to deal with I've found that each year I do mine they get a waxy like build up on them which I'm assuming is the biodiesel mix going into most fuels now, and using logic if its covered in waxy deposits then it won't be letting the fuel flow through it as easily. Doing it properly is straight forward though, for the rear filter by the tank, just follow the simple steps, I've done a video on changing that filter so just search for it and you just need to make sure the housing isn't damaged, etc. For the one in the engine bay, I believe it's a fairly similar procedure. Luckily on these beasts the re-prime isn't too difficult and doesn't need a garage to re-prime the system and get it flowing again (A lot of diesels if their fuel line goes dry/bubbles then they struggle to start again as @@bignev mentions, but in our case that's not the problem). So check which one you have and order it accordingly.