STR units are used on the following Regionalbahn services:
RB 70 Merzig - Dillingen - Saarbrücken - Homburg - Kaiserslautern
RB 71 Trier - Saarhölzbach - Saarbrücken - Homburg
NN1 units are used on the following S-Bahn services:
S1 (Bamberg - Erlangen -) Nürnberg - Röthenbach (links Pegnitz) - Lauf (links Pegnitz) (- Hartmannshof)
S5 Allersberg (Rothsee) - Nürnberg
For S5 services 026-029 are fitted with LZB train protection system to allow working over the Nürnberg-Ingolstadt high-speed line