A6 vs Ford Mondeo

Hi, so I asked a very stupid question. I bought an A6 (data see below) a few months ago and my buddy bought a 98 Ford Mondeo 2.5l V6 24V automatic for 4,500 €. I paid 13.000 € at the time. Well, earlier in the car we had a discussion. He said that he was stronger in the suit and that my 13.000 € were badly invested. The Ford has exactly the same characteristics as the Audi and is cheaper. Can someone please explain to me why the A6 is a lot more expensive? I I mean that you have more security for 13.000€ and surely you pay a little bit to the name. But I didn’t think of any more… Does anyone else know any points with which I can counter? MfG.ZeRo2o0o P.S. Hope you understand the text… was in a hurry