I have a Eurail global pass (2nd class) and would like to book a reservation for a 1st class seat for one part of a journey, specifically for the Belle Epoque golden pass (Zweisimmen to Montreux). Can I book the route upgrade online through the SBB website? Is there a discount for the upgrade since I have the Eurail pass (ex: Half-fare) or is it the full upgrade price for a specific route?
Thank you!
