EW 2522 then EW 9443 at Barcelona
Stuttgart → Barcelona → Düsseldorf
Timetable, Barcelona time
20:00EW 2522 from Stuttgart at the gate
19:35EW 9443 to Düsseldorf leaves the gate
23 h 35 apart on the timetable, overnight
EW 9443 leaves 23 h 35 after EW 2522 arrives on the timetable: more than half a day, so not a connection we count.