I'm guessing that on cars under 5 years it's going to make values fluctuate subject to history, as if they don't anyway. As a previous owner of a speed six engine TVR, values on those were all over the place depending on whether the engine had detonated and been rebuilt.... or had yet to detonate!

Perhaps when buying from outside the Audi dealer network (and subject of course to it having FASH up to that point) it might be worth getting an independent to run it through a main dealer prior to purchase just to maintain the history?