[4] The section between Hilden and Ohligs (now Solingen Hauptbahnhof) was opened on 3 January 1894.

On 13 December 2009, S 7 services were discontinued and operations on the Düsseldorf–Solingen line were taken over by an extension of S 1 from Düsseldorf Hauptbahnhof.

These services are operated at 20-minute intervals, using coupled sets of class 422 four-car electrical multiple units.

[6] There are plans to electrify the Wuppertal-Oberbarmen–Solingen railway and to extend the service to Remscheid and Wuppertal.

The entire line is in the area of the Verkehrsverbund Rhein-Ruhr (Rhine-Ruhr Transport Association), which establishes service levels and sets fares for it.