That German version of Wallander was actually the second Swedish series, with Krister Henriksson and the late Johanna Sällström in the leading roles. It was adapted for German television. Sällström committed suicide in February 2007; she was 32.
I've read and enjoyed all the Wallender books, so an English-language series is welcome. Do you know if they'll be shooting in Sweden, for authenticity? It seems that half the story in a Wallender book is about the countryside itself.
(I assume the German version is a dubbed-from-Swedish one?)
The German version is the Swedish one, with German actors dubbing the voices of the Swedish actors.
By the way, the title of the series/name of the principal character is Wallander.