Commuter trains in the Interregio service. Especially on weekends, it often happens that the IR 75 trains between Constance, Zurich, and Lucerne are needed on other routes. In such cases, rolling stock built for the Zurich S-Bahn is used on this line. The two DPZ+ trains with Re 450 locomotives # 028 and #075 are running as IR 2116 on the IR75 line from Konstanz via Winterthur-Zurich-Zug to Lucerne, between Winterthur and Winterthur Tössmühle.
