Hi Ben, just wanted to confirm my understanding. I checked the route to Avenue de Suffren from CDG and it mentions getting off at Denfert-Rochereau, change to Line 6 metro and then get off at Bir-Hakeim station and walk the rest of the way. Is buying the RER B tickets @11.45€ be sufficient or do I still need to buy a single use metro ticket? Arrival to CDG is around 3pm on a Sunday. Thanks.