as well as the announcement that he will never gain set foot outside the Vatican. As he is no longer pope, he no longer njoys diplomatic immunity and could be arrested if he leave the Vatican.
We don't know if he still enjoys diplomatic immunity or not. He still is a citizen of the Vatican City State as well as being German and we know nothing about how the VCS handles diplomatic immunity. But - I have yet to imagine any judge who would order a warrant against a former pope! Especially as I personally believe Joseph Ratzinger has never ever broken a law that he was aware of and that he has accepted as being valid. I don't think he was directly involved in disciplining priests or in bringing priests to worldly justice who have committed crimes. That was not his job and he is not responsible when others failed to react properly. What he did was viewing the situation he was made aware of in light of the Church doctrines and advise on how to handle things. He was not the executioner!