If I put together a pass for a trip, how do I 1) Upgrade its default of second class to first and 2) select and pay for high speed trains? Do I first pay for the basic pass and then amend it through seat reservations? If so, how do I do this? Will adding class and speed require booking a specific day or can I pay for those things whenever I use thr train for those connections?
Best answer by SchelteView original