[1] Born in Esch-sur-Alzette, Wengler studied at the Conservatoire Royal de Musique in Brussels and at the Musikhochschule in Cologne.
With the RTL Symphony Orchestra, he has recorded a series of CDs covering works by Luxembourg composers.
[2] Wengler has composed around 80 works, including symphonies and concertos as well as a stage, chamber and ballet music.
In 1983, he wrote the music for Volker Schlöndorff's film Swann in Love with the Munich Philharmonic.
[2] His compositional style was initially influenced by Beethoven and Mahler and later by Karl Amadeus Hartmann and Hans Werner Henze.