Would like some advice as having just purchased my a3 2.0 tdi 140 (8P?) 2008. Its done 57000 miles and everything was sweet until yesterday. Have now developed a faint whistle on acceleration I would like to think the turbo is ok, and I know they can whistle, and this one didn't before yesterday!. Can anyone tell me, is it a possibility that a inlet hose could be half off, or maybe split, making the whistling noise?. I do have warranty on the car which is looked after by Auto-Protect, and they use Halfords.......don't know what to think about that! they said to me that diagnosing is not covered by the policy and they will charge me to find the problem, and if it does turn out to be something sinister the policy should pay out. Please help!