Hi there, I have a question. Can it be that there are different chips for Quattro and Frontriebler? Difference e.g. torque course. It is about the A6 TDI type C4 with AEL 140PS. A colleague of mine has a Quattro with chip which has between 2000-3000U/min vibrations in the drive. Now he has “allegedly” a chip (or 2) extra for the Quattro. Performance however not as much as before. I have a front-wheeler and wanted to insert the “old” chip. Just h I don’t like bad surprises. Does anyone know anything about it? Thank you for your answers!