I cannot find Auber RER A station on some maps nows and a route planner is not showing it any more. Is Auber closed? Permanently? We need to get from Gare St. Lazare to Disney Paris at night (9pm). We were going to walk over to Auber and get the RER A. Is that still an option?
According to RATP sites official route of RER-A, http://www.ratp.fr/informer/pdf/orienter/f_plan.php?loc=reseaux&nompdf=rer_a&fm=gif, Auber is still listed as a stop. But your correct, I don't see it listed under Googlemaps. My RATP map shows that St. Lazare, Haussmann-St. Lazare, Havre-Caumartin, Auber & Opera are all connected to each other.
I had some trouble with Google Maps not being as accurate for transit in Paris. I suggest using the route planner at www.ratp.fr instead for the most accurate info.
You should plan out your trip on ratp.fr/en. The Auber station is open and RER A is running. The ratp site updates for disruptions in service so if you check on the date of the trip and there is a problem with the trains, it will tell you.