Here are some pictures of the TEE Rheinpfeil with Roco locomotives and Trix/Marklin cars:
Nice. Unfortunately, I model the era 5-6 period, by which all the TEE trains were gone -- or I would be tempted to include one of these beautiful trains.
Though I traveled (mostly) on a first class Eurail pass on my trips in the 1970s and 1980s, and some TEE trains rain into Austria, I don't think I ever traveled on a TEE train. A check of Wikipedia showed that the last TEE service ended in 1995 -- lather than I would have thought.
(I did travel on the Orient Express -- after it was a sad and tired old train -- not on one of the luxury recreations, though I did see one of those in Paris.)
I noticed that a DB TEE diesel train set is among the anniversary re-issues being put out by Roco this year. Another nice looking train.
Since you missed the TEE trains, here is an Intercity with 1st class only from the late 1970s: