As far as I can tell, none of the music in the film Mayerling (1968) was by the composer Mozart. However, there was music by Aram Khachaturian (Adagio from Spartacus), Johann Strauss I (Radetzky-Marsch), Johan Strauss II (Morgenblaetter), Adolphe Adam (Giselle) and Iosif Ivanovici (The Waves of the Danube).