I've managed to stop the overworking lift/intank pump on mine and so far no noise.
I'd just like to say thanks for the info/advice/answers on the subject
invaluable to someone like myself unfamiliar with the 3.0crd
My 2 cents worth ? Presume nothing and follow basic fault finding as listed way near the top of this thread by Drew. I was lucky , mine was an easy fix, it was the fuel filter presumably blocked. £20 in our money instead of £600 plus.
Thing is though on balance of probability it really shouldn't have been the filter. It's a genuine Merc part, fitted by Merc, nowhere near its service date. I never use cheap **** diesel from dodgy garages and yet