New defects after return

Hello Together, your opinion about the following situation is asked here. Everything in a nutshell: On 27.02.2003 a 3way financing at Peugeot completed, 36 months duration, 20,000 KM per month, on 08.03.2006 the car with 47,815 on the clock back to the dealer, after 2 inspections & a minimum list of defects (a defective steering rod + 2 worn summer tires), the car was bought back again by the friendly for XXX€. Deregistration by the friendly 11.20 € fee + 10 0,00€ for new TÜV & AU & 80,00€ for the steering rod, all this has been deducted from the sum of the lower kilometers. Remained are about 500€ which should go back to me. On Tuesday I learned from my insurance that my car is still registered, a call to my former friend confirmed the whole, after a conversation with the managing director came today a letter from the car dealership with a list of new defects with a total cost of 1,500€. e Community??? Greetingz Roman