Well, after a few reinstalls it seems to work:
Alt Gr S = ß (German Eszet character)
Alt Gr ( = « (Guillemet)
Alt Gr ) = » (Guillemet)
Alt Gr C = © (Copyright symbol)
Alt Gr N = – (N-dash)
Alt Gr M = — (M-dash)
It doesn't work in Notepad but it appears to work in the browser and other apps.