In addition to his solo career, he has recorded under the monikers Auch, Betrieb, and Ferdinand Fehlers, and as a member of the duo Autopoesies and his band März. In 2001, he began recording Plays, a series of singles to serve as tributes to some of his sources of aesthetic inspiration. He followed this album with the more abstract Politik Braucht Keinen Feind (2003), A Life Without Fear (2006), and most recently Adikia (2012). Since 2000, he has been working on ballet scores for the choreographers William Forsythe and later Christoph Winkler, and theatre music for Ulrich Rasche. As a curator Ehlers has been responsible for the "Lux Aeterna" festival at Berlin's Berghain and "Audio Poverty" at the Haus Der Kulturen Der Welt, Berlin.