Hi,a noise has developed on my 3rd gen(64,000 miles).It starts when the engine reaches just below 2,500rpm and can only be described as a "light rapid rattle",this noise is definately revs related as it gets faster the higher the revs get,could it be something to do with the turbo?Maybe a blown turbo manifold gasket?Hope someone can shed some light,the vehicle is still under warranty(just).Cheers.