My early 2008 A5 2.7TDi ( 90k miles )has broken down and wouldn't start-- after taking to an independent Audi specialist they advised that it as the High Pressure Fuel Pump that had failed. I bought a pump from a salvaged 36k miles car .. This has been fitted but the garage have advised the car is still cutting out and they think that there is engine lubrication and iron filings in the injectors and fuel lines .. And it will be an expensive fix.

any suggestions if this is right .. And can I get any sort of help from Audi ?

Thanks John