Hi, I have just bought a second hand W Reg 306 2.0 HDI. I was just wondering what signs to look for if the turbo need to be replaced. Also how can you tell if it is a 90bhp pr 110bhp model. Its the 3 door model if that helps. There seams to be a high pitched noise when the car is started, it sounds like it is come from the engine, could this be the turbo? Any ideas? Also as I have just bought that car can you suggest anything else I should check before driving it regularly. Thank John