Berlin-Wittenau is a railway station in the Wittenau district of Berlin, Germany. It is served by the Berlin S-Bahn and numerous local buses. It is also the northern terminus of the Berlin U-Bahn line.OverviewThe station opened with the Nordbahn (Northern Railway) from Berlin to Neubrandenburg on 10 July 1877, then called Dalldorf, the former name of Wittenau until 1905. When a second railway station in Dalldorf was erected at the branch-off to Kremmen in 1893, it received the appendix (Nordbahn). On 5 June 1925 Wittenau (Nordbahn) was connected to the S-Bahn network.The U-Bahn station opened on 29 September 1994, with the northern continuation of the U8 line to reach the nearby housing estates of Märkisches Viertel. S- and U-Bahn station then received the appendix (Wilhelmsuher Damm), the main street leading to Märkisches Viertel. It retained this designation even after the former Wittenau (Kremmener Bahn) station was renamed Karl-Bonhoeffer-Nervenklinik on 28 May 1995.