S2 is a line on the Berlin S-Bahn. It operates from Bernau to Blankenfelde over: the Berlin-Szczecin railway, opened on 1 August 1842 and electrified on 8 August 1924, From Wikipedia
Criminal cable theft at Humboldthain and subsequent technical issues disrupt Nord-Süd and Ringbahn services, with repairs ongoing and investigations underway.