Mülheim (Ruhr) Hauptbahnhof Mülheim (Ruhr) Hauptbahnhof Mülheim (Ruhr) Hauptbahnhof is a railway station for the city of Mülheim in the German state of North Rhine-Westphalia. It was renamed as a Hauptbahnhof in 1974 at the time of the rebuilding of the Dortmund–Duisburg line as part of the establishment of the Rhine-Ruhr S-Bahn. It is classified by Deutsche Bahn as a category 3 station. The original station is unusual in that it was built as two adjoining stations by the two main private railways buildings lines in the Ruhr area, the Rhenish Railway Company ("Rheinische Eisenbahn-Gesellschaft", "RhE") and the Bergisch-Märkische Railway Company ("Bergisch-Märkische Eisenbahn
S13 (Rhine-Ruhr S-Bahn) to Troisdorf by the Rhenish Railway in 1870, with an extension to Cologne opened in 1874) and the Cologne Airport loop (opened in 2004) The western section of the S 13 service from Düren to Köln Messe/Deutz was opened on 15 December 2002. It was extended to Troisdorf on 13 June 2004. It is proposed to extend the line to Bonn-Oberkassel. S13 (Rhine-Ruhr S-Bahn) Line S 13 is a S-Bahn line of the Rhine-Ruhr network. It is operated by DB Regio with class 423 electric multiple units. At peak times, the S13 services begin or end at Düren and run