When I looked at a GTI at a main dealer, I turned up and it had £239 admin fee sticker on the window, at a main VW dealer, I was shocked! I protested and said it wasn't in the Autotrader Advert, dealer said yes it was, it's our policy, blah blah. I showed him the ad on my phone and it wasn't there, still wouldn't budge. So I went and bought a car somewhere else, lesson learnt.