Hi, I got my A7 40 TDI back in January. I had to take it back to the dealer 8 times. The purpose of the first 7 trips was to rectify rattling issues coming from various places (mostly from the central console). The last job resulted in a full turbo replacement due to drive system failure error. It took them more than a month to source the part from a supplier and they are currently testing the car before handing it back to me. I must say, this is extremely unpleasant experience.