:aargh4: I currently have an A4tdi 2.5 V6 avant and like many of you I am experiencing loss of power. Last February car broke down and was towed to main *******. After diagnostic main injector pump was at fault. New pump fitted and as mileage was 122k got all timing belts/pulleys and AMF done as well costing £2,387. Car going like a rocket again til Jan. Back to *******, faulty AMF which they replaced. 5 weeks on and once again no power, and there's no way they are getting any more out off me. I have read many threads today and will be following the advice that many have given others so it looks like all pipes will be checked and turbo will be coming off for a good cleaning. Will update with results.