Archive of the former Yahoo!Groups mailing list: The Mellotron Group

There is the documentary from 1983 on the German rail (DB) site.
The music seems to contain Mellotron or similar.

http://bewegtbild.deutschebahn.com/btvo/site/index.php?s=3300&ids=142553

The video title/description & link on page (in German)
"Partner der Zukunft - Der Kombinierte Ladungsverkehr"

Notice at 4:50 mark and at the end (closing with credits) the
sounds are very "Mellotron-ish" sounding. :)

-Allan