Eurorail select pass: Reservations?

1. This is not part of Eurail either, in fact, it is a local Paris transit ticket. Zone 1 to 5. 7.60 EUR pp each way.
2. Get a reservation from Rail Europe.
3. Don't need a reservation.
4. Although a reservation is not required, you are traveling at the conclusion of a major event and the trains will be packed, so get a reservation if you want a seat, otherwise you'll be standing for the 40 minute ride.

You bought a pass for 5 rail trips, one of which is a regional journey. I think you just flushed some serious cash down the toilet.

Not only is one a regional journey (Paris transit ticket), another one is a 38 euro Saving Fare trip (or a half hour longer 29 euro regional fare).

Sunday, June 25 is the conclusion of week long Martin Luther festival in Lutherstadt-Wittenberg. The 38 EUR Sparpreis tickets are long gone.

Buy your ticket from London to Paris ASAP before (more) of the cheaper tickets sell out. The website is: http://www.eurostar.com
You can get a "print-at-home" ticket.

Have you looked up times for your other trips?
Best place to look up times: https://www.bahn.com/en/view/index.shtml But you cannot buy your reservations on this site.
1) Doesn't count, as Sam says it is Paris RER (express métro) line A, just buy a ticket from the machine on the day. The station is called "Marne-la-Vallée – Chessy", and is the end of the line.
2) Paris to Amsterdam is a high speed train branded "Thalys". Reservations needed.
3) Amsterdam to Lutherstadt Wittenberg will involve changing trains and take 7-8 hours. Look it up on the site I listed above ("Amsterdam Centraal" to "Hauptbahnhof, Wittenberg"). Reservation would be a good idea.
4) .Wittenberg to Berlin takes ~1 hour, and some €15 tickets are still available.

The Eurail website states that the "Eurostar high-speed train connecting London with France and Belgium is covered if you have a Eurail Global Pass, or any other Eurail Pass that includes France or the Benelux (Belgium, Luxembourg and the Netherlands).

A reservation is required for this train and can be made from 12 weeks in advance."

Call whoever you sold you the Eurail Pass and make reservations - they will also let you know whether or not you need reservations for your other train trip.

Have a great trip!

"I think you just flushed some serious cash down the toilet."
Perhaps. Depends of course on the cost of your individual trips.

Current saver fare prices for 2 adults for 2 trips at DB Railways:
Trip 3 = €180
Trip 4 = €29

I suggest you research the other journeys to find the total cost of individual tickets. It looks like Disneyland wouldn't cost much:

http://parisbytrain.com/rer-train-paris-to-euro-disney/

A 5-day 3-country twin pass (for two) costs around $770. You could refund the pass (losing maybe 15% = $115) and probably still come out significantly ahead with the individual ticket strategy.

You can buy pass holder reservations for both the Eurostar from London to Paris and the Thalys from Paris to Amsterdam .at https://ricksteves.raileurope.com/us/rail/point_to_point/triprequest.htm.

Perhaps you're both under age 28 and spent a little less than Russ' estimate.