Warranty is from date of purchase..... I got 2 years (took PCP, which lasted ~14 hours), but it was from date of purchase, not balance of factory plus 2 years.
The "Approved Used" warranty isn't as good as factory either, dealers have to jump though approval hoops and it isn't "bumper to bumper".
I told them I wanted 2 years as I'd seen it on the Audi website, they agreed and it was done..... I then realised the offer had ended the month before, so they can do it at any time I think, suspect it costs them though
