Boring question #38: Your self-parking car causes and accident, who takes the blame?

You have a self-parking vehicle, but for some reason instead of parking itself, it bashes another vehicle causing visible damage, who takes the ding, you, the auto maker, or is just seen as an act of nature? Technically, you were in the car but not driving it, the computer was. The computer programmed by the automaker, ands supposing smart enough to know if it can park in the space or not. The mere fact you were behind the wheel, whether or not you were actually steering the car put the accident on you? To get out of it would you have to prove the parking system was faulty?