May 6, 2019 - 9:01 AM
I don't want to beat a dead horse but this is the response from eurail:
Thank you for contacting the Eurail customer service team. Good to see that you are checking up on this.
When looking this up in the Eurail timetable, you can see that for this trip, a change is recommended in Montreux. You can see this yourself too, whenever you are filling in Lausanne and Rocher-de Naye in our timetable.
The first train that has to be taken is abbreviated by TRN. These trains are always included in your Pass. You can also look this up in the timetable of SBB, which is the national railway company of Switzerland. They will also give you this journey, and give more details into what kind of train it is. Their website for example shows that there is a InterRegio train operating between these two cities, which is abbreviated as IR.
The second train that has to be taken between Montreux and Rocher-de-Naye is a RegioExpress train, which is abbreviated by RE. This train will also always be included in our Pass.
You can also read this on our website, which says that the Eurail timetable RegioExpress trains are listed as "RE", and Regio trains as "R". InterCity trains are listed as "IC", and InterRegio trains as "IR". Regional and Intercity trains do not require seat reservations. Reservations are however recommended for Intercity trains during high season (May-September) and public holidays.