Can I change my advert on Autotrader to an auction? You can't change your advert to an auction. If you’d like to sell your car by auction: Remove your advert from Autotrader Head to 'Sell My Car' and select the auction option Related articles How much is it to auction my car? I've sold my vehicle, how do I delete it from Autotrader? What do I have to do to auction my car? Can I pause my advert? What is Dealer Auction?