What are the stations on the rail line along the Rhine from Koblenz to Rhudesheim and timetable?

Answer 1

Yup, above answer is fine, give him the 10 pts.Its spelled Ruedesheim though (you won't find it with the spelling you used).It will then list a number of choices, what you want is "Ruedesheim (Rhein)" (=Ruedesheim on the rhine).
Below is a list of all stops for a RE-train from that website :
-Koblenz Hbf
-Niederlahnstein
-Oberlahnstein
-Braubach
-Osterspai
-Filsen
-Kamp-Bornhofen
-Kestert
-St Goarshausen
-Kaub
-Lorchhausen
-Lorch(Rhein)
-Assmannshausen (yeah, I know...americans always get a fit
of laughter from this one)
-Ruedesheim(Rhein)

Answer 2

Try their web site,lists all stations. http://reiseauskunft.bahn.de/bin/query.exe/en
The train gives a much nicer view of the Rhine than boat. Lovely place