423 664-2, a Munich S-Bahn (suburban railway) EMU, was in service on the NRW (North Rhine-Westphalia, a state in the west of Germany, far away from Bavaria) S 12 on 20 January 2007, seen at Düren after arrival as S 8341. As the passenger information system is not programmed for these duties, the line number is indicated by a sheet of paper at the windscreen and the annoncement of the stops inside the train is done "manually" (by the driver using the microphone). Note that the EMUs from Munich do not have a first class compartment next to the cab, unlike the EMUs normally running in NRW. The second unit was a normal NRW unit, with first class compartments.
Digital photo by Christoph Schmitz (christoph.schmitz2@post.rwth-aachen.de)