Originally Posted by
dingo
Didn't know that was an option, so thank you! I usually book into first on the ICE. Anyone know what happens if, on the off chance, there are no first class seats when we hop on the train since there won't be seat assignments?
Some trains require seat assignments, though sometimes only for certain portions of the journey, so be sure to check when you purchase your tickets. If your train doesn't and you can't find 1st-class seats, you won't get into trouble if you sit in unreserved seats in 2nd-class for your relatively short trip from Frankfurt to Heidelberg.