S75 is a line on the Berlin S-Bahn. It operates from Wartenberg to Warschauer Straße over: a section of the Outer ring, completed in the early 1940s as part of the Outer freight ring, the Prussian Eastern line, opened on 1 October 1866 and electrified on 6 November 1928, References Berlin S-Bahn lines fi:S75 (Berliinin S-Bahn)