森德灵门
This booster line started operations in December 2013. It only operates on Saturday afternoons. The U8 begins in the north at "Olympiazentrum" and shares the tracks with the U3 as far as "Scheidplatz", where it continues along the U2 tracks to "München Hauptbahnhof" and terminates at "Sendlinger Tor". It is only running on Saturdays to ease crowding on the U2 and U3 lines, and to provide people an easier access to the Olympic Park from Munich Central Station.