In journey mode, the scenario ‘Fog on the Rhein’ in Hauptstrecke Rhein-Ruhr is listed as part of Chapter 2. Chapter 2 is ‘S-Bahn Driver (BR422)’. However, ‘Fog on the Rhein’ is operated by the BR425. Therefore, this scenario is listed in the wrong journey chapter in the game.
That reminds me of the Journey in Peninsular Corridor where a in a scenario you get to swap ends to drive the cab car for a return run before you get to the cab car chapter and the tutorial on how to drive it.