As Dick says, there are flaps on the wing bottom, and what looks like a flap on the inner wing's trailing edge is called trim tab (Trimmklappe) in the German Wikipedia article (good pictures showing the flaps there). The English article isn't bad either. The airplane had also fixed leading edge slats on the outer wing parts. (Not a bad idea for the swept wing.) You may also see 3views of the A and B versions.