Originally Posted by
carnarvon
2B and 2D are linked by a new building used for security.
Check-in where you are told, then walk to the middle building.
Past security, follow the signs.
It is very easy and well sign posted ( gates and lounge).
Sheltair is no more. Extime is the new one. AFAIK, it serves both wings B&D.
Look at a map of CDG if my answer is not clear enough.
Enjoy.
Edit
Ok, so 2B and 2D are linked airside, thank you! FWIW this was not clear from the FAQ above.