So sorry what a nightmare! I do not think I would have paid more for the engine than I paid for the car ... I would have stopped and consulted an attorney at that point. Wonder what actually caused the engine failure ... Guess I need to re read all the text here in case that might be guessed. I just bought a 4.8l x5 2007 from a private party it came with last 5 years of Bmw service records so I can see thankfully no fundamental engine or trams issues. Wonder what the service history of your car is .... Porsche will provide a cars service history that they have performed but not Bmw. Best of luck you deserve to win. Post what happens please