KK2 units are used on Dieselnetz Köln services, operating alongside class 620 on RE 12 services and exclusively covering RB 38 services:

RE 12 (Eifel-Mosel-Express) - Köln - Euskirchen - Gerolstein - Trier

EMST units are used alongside class 643 on Münster West services:

RB 64 (Euregio-Bahn) - Münster – Gronau – Enschede

EDO units are used alongside class 632 and 633 on Sauerland-Netz services:

RE 17 (Sauerland Express) - Hagen - Schwerte (Ruhr) - Bestwig - Brilon Wald  - Warburg (- Kassel-Wilhelmshöhe)

RB 51 (Westmünsterland-Bahn) - Dortmund - Lünen - Coesfeld - Gronau

TU units are used alongside class 628 on the following Ulmer Stern services:

Ulm - Schelklingen - Ehingen - Munderkingen

Ulm - Langenau - Heidenheim - Aalen (- Ellwangen)

RHL units are used alongside class 641 on Aulendorfer Kreuz (Los 16c) services:

Basel Bad - Bad Säckingen - Lauchringen (- Erzingen)

Lauchringen - Eggingen - Weizen