FR 9481 then OS 253 at Vienna
Cologne → Vienna → Hamburg
Timetable, Vienna time
22:10FR 9481 from Cologne at the gate
12:45OS 253 to Hamburg leaves the gate
14 h 35 apart on the timetable, overnight
OS 253 leaves 14 h 35 after FR 9481 arrives on the timetable: more than half a day, so not a connection we count.