[rebyn]

I got the Deutschlandticket for May and am tempted to travel from Berlin to Stralsund. Using RE/RB for this journeh takes more or less three hours without any train change (so not having to deal with the possible delay(s) and missing connecting rides), however I do hope the operator supports reserving a seat in advance with this subscription, cause otherwise showing up at the station not knowing for sure I'd have a seat would deter me from using this offer and instead just book ICE/IC (if any).

[generationP]

Very few regional trains allow for reservation. See https://www.bahn.de/angebot/zusatzticket/sitzplatzreservieru...

[mqus]

reserving seats in rb/re trains? Never heard of it.