http://www.imdb.com/title/tt4176826/It's about Hitler waking up in modern day Berlin, not remembering anything since 1945. Everyone thinks he's being satirical and he turn into a national celebrity.
Pretty good comedy, though it dragged out just teeny bit too long. It's fairly political though, so if political humor isn't in your taste then it's not the movie for you.
It's also in german, but if you're used to reading subtitles that shouldn't be too big of a problem.
Overall I recommend it.