I found an informative article about the situation concerning the European night trains right now.
We will not give up! Sending e-mails might help and travelling more by train will certainly have an impact!
Back on Track: WCN’s Campaign to Improve Europe’s Cross-border Trains
Rendezvous on Champs-Elysees… Leave Paris in the morning on T.E.E.
In Vienna we sit in a late-night café… Straight connection, T.E.E.
So sang Kraftwerk in their 1977 masterpiece Trans-Europe Express, but there are no direct trains on this route today. And bad luck if you want to travel between Paris and Munich, Berlin or Hamburg: overnight trains were axed in December 2014. Read on if you want to know why and what could be done to stop the deterioration of Europe’s international passenger train network…