Fun quiz, thanks! I've never heard about Hitler having worked in a VW-Factory, though. And my first guess for the "tiny principality" would have been Austria, presuming that some Americans still watch out for the Emperor when they visit Vienna.
There are various theories about Hitler's whereabouts. The Soviets reported that he committed suicide and was burned, but that is obviously a propagandistic lie. There are people who believe that Hitler joined the Nazi base at the dark side of the moon. While this base does exist, it was in fact operated by followers of Hitler, not the man himself. I recommend the excellent documentary Iron Sky. The Argentina version has been ascertained to be the most credible by such esteemed authorities as History Channel.
More specifically the guy in this video mentions that Hitler was a shift supervisor, even though he was around 90 when VW opened its first factory in Argentina.