My 2015 Mercedes-Benz A45 AMG was used and advertised by a dealer. The advert stated it had a performance exhaust fitted (an extra) and a full Mercedes-Benz service history (which they would provide me with after the sale, as it needed collating and printing off). Upon purchasing the car 6 weeks ago, I immediately found that it did not have the performance exhaust fitted. The dealer offered me a free service, as a gesture of goodwill, which I accepted. The trouble is that the service history does not exist on the Mercedes central computer (as I found when registering the car), and as the car has had 2 previous owners, and covered 26,000 miles, I think that the history is imperative. The dealer keeps fobbing me off regarding this and has offered to buy back the car at a reduced price if I'm not happy. I have informed him that I either require the full history or for him to buy back the car at the full price that I paid. What options do I have?