Looks like you've got ÖBB Baureihe 1116 visble here and if it's not needed to run Nightjet 424/425 then it will couple itself onto Doppelstockwagen 767.2 766.2 781 786 if a 146.2 has broken down. Rhein Sieg Express RE9 Aachen Hbf Köln Hbf Siegen Hbf. From Siegen it can possibly deadhead to Frankfurt am Main Süd to rejoin the Nightjet 424/425 combined with 420/421 for the trip back to Austria via Main Spessart Bahn Nantenbacherkurve and Schnellfahrstrecke Hannover Würzburg
Looks like you've got ÖBB Baureihe 1116 visble here and if it's not needed to run Nightjet 424/425 then it will couple itself onto Doppelstockwagen 767.2 766.2 781 786 if a 146.2 has broken down. Rhein Sieg Express RE9 Aachen Hbf Köln Hbf Siegen Hbf. From Siegen it can possibly deadhead to Frankfurt am Main Süd to rejoin the Nightjet 424/425 combined with 420/421 for the trip back to Austria via Main Spessart Bahn Nantenbacherkurve and Schnellfahrstrecke Hannover Würzburg