If you arrive in L or M, you may take the automated train connecting to “main 2E” from where you will walk to 2F. This will save some walking for your wife. If you arrive in M, there is no other choice anyway. If you arrive in L, you have the choice of doing this or walking all the way. But just follow the signs to 2F and you’ll be fine.
Also, if your wife has troubles to walk, you could request the wheelchair assistance.