Ok, Last week my Audi A3 TDI 170 lost lots of power, like there was no turbo pull on it at all!! but not in limp mode!! No EML! Took to a local garage, NO FAULT Codes! But they found my diesel to be black and contaminated with oil and they suspected it was injector fault. So i booked the car into the main dealer to check it out as the car had the recall less than 18 months ago. Took it in today was well greeted and was happy with customer service provided. Later today I get a phone call from audi. Basically they said that they could not get a fault to show on their diagnostics and that they didnt know what to do other than let me take the car back unrepaired! So I was a little shocked and asked for more details on why they couldn't diagnose a fault and that its their job to find the problem, thats the reason why they have it. But all i got back was, our diagnostics wont throw a fault code so theres nothing wrong with the car and to take it back! So I asked if the technician had drove it. She said no why would he? Then i told her why and what the faults was. Then they said that my ECU software was corrupt because it has been remapped and had the DPF removed. So then I asked why would that be a problem? the cars run fine for the last 12 months without fail, only a cough in a morning. Then she said we can tell that the car has been messed with by just looking at the car?? So i continued to ask her to explain why? everything on the car is original! after a little arguing I then asked why my diesel was black then? My local garage says it the injector seals thats let oil get in the diesel, these was replaced my you less than 18mths since. Then she said she would ask the technicaian and get back to me. 1 hour later, audi calls me back. "4 technicians have looked at your diesel and theres nothing wrong with it." I continued and said fair enough, I will come through myself, remove the diesel filter and prove your technicians wrong. Then they say the took it for a test drive and said that it was fine! Its clearly not! Anyway, after i said i will come to show the tecnician that the diesel was black, they changed the story again saying, "oh sorry, we thought you said oil was contaminated, not diesel." "we will have another look monday, if we cannot find a fault you will have to take it away as it is, we don't know what to do wiith it." I said they could have the car as long as they want as long as they find out whats up with it, Then all i got was, "how much time, and how much money have u got because it will end up costing more than the car is worth." How rubbish is this? I thought that the dealer would be the best place for it! The only reason it went to the dealer is because the injectors are still under warranty! but they dont want to know! then they tried saying that because it was done under a recall that they may not be any warranty!