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
S6 (Rhine-Ruhr S-Bahn) 1968 and from Garath to on 12 December 1968, from Langenfeld to Köln Hansaring on 2 June 1991 and from Hansaring to on 13 June 2004. S6 (Rhine-Ruhr S-Bahn) Line S 6 is a S-Bahn line in the Rhein-Ruhr network. It calls, among others, at the cities of Essen, Düsseldorf and Cologne and was one of the first S-Bahn lines in the Rhine-Ruhr network, becoming operational on 28 September 1967 between Ratingen Ost and Düsseldorf-Garath. It is operated at 20 minute intervals using coupled sets of class 422 four-car electrical multiple units. Line S 6 runs over lines built by