If it’s the same train that isn’t a problem. You have your reservation, and a valid ticket. That’s all you need to roll.

You can also add the train manually. You just set the departure and arrival dates, and the train number. Then you’re equally as good to go!

IC are 3 seats cars-that do not as such even need to be RES-but very advisable in hi-season.

The much more expensive couchette/sleepers are run as NJ.

Note that next morning these trains are nearly always late-often more as 1hr-though this one (I used it myself a week or 2 ago) seems less probe to it, as it does not split/combine with others during the night.

IN side DE=germany there is still rule to wear medicinal masks.

Hello! Please accept my apology for the late response.

I would recommend checking our online reservation service timetable and check the options available.
Please be kindly reminded that you need to be logged in and have selected your created trip and travellers to use the reservations self service system. 

https://www.eurail.com/en/book-reservations

Furthermore, please be kindly reminded that the Pass and seat reservations are independent and, as such, reservations will not show in the app. You will receive them by email or by post-depending on the type of reservation offered- and you will need to show the Pass and the seat reservations during controls.

I hope this helps!

Kind regards,

Annie