Hey, small world - my wife and I will be at the MCE at the end of August celebrating our 40th.
Recommeded transport from CDG ( Don't rely on this info - we always arrive at Gare du Nord rail station on the Eurostar train from London and then catch the metro subway.)
To use the subway you may have to travel on an RER train to the Metro subway. On the subway you have to get off at a station named GEORGE 5. the hotel is then one block away.
Have a great time.
Leslie, really has some good information for you! It is very easy to purchase an RER ticket at CDG for a train ride to AdT from the airport. I recommend doing this is you don't have too much luggage. Most of the times, the escalators are NOT working and is is difficult with a lot of bags. It will save you a lot of money.
Just walk down the C-E, on the East side of the street, and when you see either the Sephora store or the Marriott C-E sidewalk cafe, you are there!