Hi Friends,
I’m trying hard to find seat reservation for ICE/TGV trains from Heidelberg/Mannheim/Karlsruhe to Paris.
But seems for all the train DB website shows error message like “Reservation cannot be made”.
Like this :

However Raileurope website shows message like Seat reservation has to be made at station.

Can someone please help me guide what could I do ?
Does it mean that seats are really full or I have to make seat reservation locally from station in Germany ?
I’m going to travel with family and toddler .. so don’t want to take chance.
I will buy EUrail pass in case I get seats for at least 2 of my journey.
Thank you great people.