Hello, I have already bought a Supersaver ticket from Interlaken Ost to Paris Gare de Lyon. The first leg is on RE 4223, and this same train appears to also stop at Interlaken West, which is after Interlaken Ost on the route.
Can I board the same RE 4223 train at Interlaken West instead of Interlaken Ost, while keeping the rest of the booked journey unchanged?
The onward legs are reserved international trains, so I would like to confirm whether this would still be valid on my existing ticket. Thank you!!