Originally Posted by
bruce80
Well, I'm not sure whether they still exist, but there have been a few overnight trains across european borders which had a D train number in recent years (Like the "Schweiz-Express" running between Amsterdam and Zurich/Milan), but they might now as well be categorized as CNL; also, I'm not sure whether there are any D trains left on the Berlin-Warsaw route.
A number of D-trains still exist in eastern Europe (certainly as overnight trains - not sure about daytime trains). In Germany, they still exist as a concept (eg: under 'advanced search options' on bahn.de, the train type options are ICE, EC/IC,
D, NV, etc) although there are now very few trains actually classified as D. As Bruce80 indicates, some of the sections attached to CNL overnight trains (eg: the Prague-Berlin seats coaches on the Prague-Amsterdam CNL) are classified as D (although some similar sections on other CNLs are classified as IC).
And note that, sadly, the Amsterdam-Milan CNL no longer exists...