I’ve read a lot about the sleeper train from Zagreb to Split and that it’s not possible to book online. I have emailed the reservation email shared in a different topic thread & will see if they respond. If we make the booking at the Zagreb station will they apply an Interrail discount? I can see couchettes that are available to book online and obviously if Croatian railways don’t recognise the pass then there won’t be a point in waiting till we get to the station. Also - has anyone booked a sleeper car - is there usually availability for these as the carriage map seems to suggest there is only one sleeper carriage anyway. 

Thanks in advance.