Hello, I spoke yesterday with a chip tuner, which seemed very strange to me: 1. Does he do the minor job (he is a private official ) 2. Does he give me no guarantee on engine and transmission and said this would be nonsense, because you can just pull this chip box out of your own hands on the next visit to the factory city and those of Audi would not even notice it. And if a problem existed, that would be on the manufacturer’s warranty. Is a damage by chip tuning really not detectable ? The chip box (similar to the KW system) is simply switched between the spreader unit and the injection pump and changes the signals that come from the ECU. What do you think of it? The price is 500 € Interesting price but I don’t have my concerns you?