Born in Pforzheim, Rößler studied church music and Protestant theology.
He was music director in the Tübinger Stift and was active in the training of theologians.
As a preacher, Rößler published the highly acclaimed Liedpredigt [de], in which the theology, poetry and history of individual hymnbook verses were worked out.
On the other hand, Rößler investigated the origin and development of hymnbooks, beginning with the Reformation.
In his Bronnweiler sermon volume Rößler as hymnologist published selected examples for the genre of a Liedpredigtde.