Vario Credit / Leasing contract ends

Hey, I got a S3 from the dealer in the fall of 2009 via Vario Credit. At that time there was still a great insurance offer, if the car is financed by Vario Credit or by leasing. The contract ends now in November 2011. Overall a final rate of approx. 22,000 € is still open in November. Currently the car is traded at Autoscout, Mobile by the 30,000 €, at the Audi dealer in FFM S3 ́s stand even for 40,000 €!. At that time I also had enough money for the car Bar Unfortunately, I don’t have this anymore because of the one or the other life situation. I don’t want to keep the car anymore. Always think about whether I will return the car and then get back one or the other thousands at the end of the year. Say the difference between the open demand and the residual value of the car. If we take the remaining value at 30,000€, I would get 800€ back. My question. But what if I buy another Audi again via Vario Credit. Let’s assume that the new car has a car value of 60,000€. Will I then be charged for the remaining value of the car? So the 30,000€ and therefore only have an open demand of 30,000€ for the new car? Or are only the 800€ counted here and thus an open demand of 52,000€? MfG