The CNL night train Munich-Berlin offers all 3 types of sleeping accomodations: sleeper (Schlafwagen), couchette (Liegewagon), and the cheapest of the three, sleeperette (Ruhesessel). I got a seat in the Ruhesessel, have used that option a couple of times, no problems, suits me fine. All 3 options require reservations. You can reserve using the DB website, the earlier the better as regards to getting the cheapest price. On the availability of night trains, in spite of some discontinued routes since beginning of 2015, lots of night routes are still in operation in Germany, such as Munich-Amsterdam, and Central Europe.