Car rental that you can’t drive…

Hello, So I have something related in Munich, 400km away from me. Now he said I should drive to him, because it does not work with the train after work and my 19-year-old box is difficult with it he said he gives me a rental car. I had no idea about it and should choose one. Up to 250€ he said, because it was for one day the most expensive cost not 200€ and I wish me a Mercedes CLS. When he then sent me the e-mail that I should take with me then if I had the When I picked up the car I found the minimum age, 27… Well, I’m 18 and the smallest polo was only 19. He said he called then, he made the car and said I’d only bring the car to him. I don’t know what kind of car this is going to be, but it works well, although I’m 18. However, I drive the CLS projectile or with the polo duck a total of 800km, I bring him practically the car but it’s not even rented to me. A police check, an accident?