Hi sudexpress
1. The NightJet is a night train and passengers travel in sleeping cars with beds. The InterCity is a normal day train with completely different carriages and normal seats.
2. Seat reservation with a Global Pass Interrail is not possible online in our webshop. We can make the reservation for you by telephone and send you the tickets by post, or you can collect the tickets at one of ours sbb counters. Unfortunately, we do not have the option of making the reservation and sending the documents to you by e-mail.
You can contact our Rail Service on +41 848 44 66 88 (0.08/min.) or, if this number doesn’t work, on +41 51 225 78 00.
Have a nice day. EllenvS.