We could do with a Diesel Tech section soon I think...
A relative has the 2000 1.7 TD G
and has an annoying sound like a bee trapped in a jam jar, only really audible with load rather than at tickover (but it is there at tickover).
It is directly related to revs. - ie - more revs - more humming.
She has the car under warrenty and has taken it back to the garage who isnt main dealer who has said it is something to do with air intake and they would fit a copper coil to it??? - this was the diagnosis without popping the bonnet - sounds a fob off to me.
Any ideas what this may be?