Hi, I am staying at the Pullman Tour Eiffel and would like to visit Disneyland Paris.
I know that I need to take RER A4 to get to the Disneyland Paris station, but what station do I begin at, and how do I switch lines?
From Tour Eiffel Hotel Pullman, walk to Bir Hakeim Metro station & take Metro line 6 towards Etoile station. At Etoile station you have to follow signs for RER A, looking for "RER A - Marne La Vallee" when you get closer to the RER A platforms (when you're far, it'll just say "RER A", without direction).
Purchase an origin/destination RER ticket from the Metro window ticket office, asking for "Disneyland" (or use a ticket vending machine, will be more complicated). The ticket is good for your entire trip on both Metro and RER trains until Disneyland Paris.