A known person bought a vehicle yesterday 2250,– € from private (probably advanced person for dealers). Contract with Excluding the liability for defects in material ( form) . At the inspection the engine ran calmly. Oil new in order. Test drive could not be made due to lack of registration plate. The car was now registered and on a journey after approx. 25 km a clak core similar to diesel (probably camshaft or defective hydrostössel. This is why a car mechanic was consulted for inspection, which also detected an accident damage. In the purchase contract only slight rust damage was mentioned which was known. In this case, according to the new legal situation, there is nevertheless warranty and the seller has to withdraw the vehicle plus registration costs. The seller himself is of course no longer available. Should he require the purchase back in writing?