Overview
- The signal box failure at Berlin Friedrichstraße disrupted S3, S5, S7, S75 and S9 services Thursday morning.
 - S3 trains are running at longer intervals between Erkner and Warschauer Straße.
 - S5 service is restricted to the section between Strausberg Nord/Hoppegarten and Ostbahnhof.
 - S75 operations are confined between Wartenberg and Lichtenberg while repairs are underway.
 - Deutsche Bahn has not identified the precise defect causing the outage.