A guy has put a deposit down on my 04 320d Touring but during the drive to get his deposit the fuel pump was a lot louder than usual. It still goes off after a 5-10 seconds on the first key turn but will come back on the moment the car starts. I'm really not keen on the chap collecting the car until I can sort this out really.
I gave the car a good blast just now and it's not quite as loud but it's still there. I have never noticed if it's meant to be on all the time or go off after a while.
Any help on this would be much appreciated.