Hi i have a whistle when being revved (it's all the time but more noticeable at at 2,000 rpm upwards) a mechanic said it's probably just a split pipe from the turbo taking in air (though he did only listen not actually look) is there any easy way to find it? Please help as I'm saving for my wedding so can't afford to take it to a garage my car is a audi a6 c6 4f 3.0 tdi quattro bmk engine
Thanks
Thanks