OverviewPublicTransportation from Schoenefeld Airport to your destination:
NOTICE: Regional & intercity rail links within the Berlin urban area may experience disruption up to November 2, 2015. This afffects lines RE1, RE7, RB14 & RB21/22, as well as Schoenefeld Airport's Lines RE7 & RB14.. For details (in German only) open :http://www.s-bahn-berlin.de/aktuell/2015/137_sperrung_stadtbahn_ferngleise.htm
By Train: The underground ICE-enabled train station has 4 long-distance and 2 S-Bahn rails.
From Airport to Berlin's Main Train Terminal (Hauptbahnhof) - with connections to the U-Bahn trains (subway): 'Airport Express', Line RB19, is a new & additional connection, taking only 25 minutes. There are three other lines serving the Airport: RE7 (Dessau to Wunsdorf-Waldstadt); RB14 (Nauen to Schonefeld) & RB22 (to Potsdam).
S-Bahn S9 runs between the Airport and Treptower Park station, where there is a connection to lines S41 and S42 of the Berlin Ringbahn.
Line S45 is presently not available. For public transport network tickets for Berlin and the whole of Brandenburg (S-Bahn, day and group tickets).