ok, i added
deb
http://www.debian-multimedia.org sid main
to the list and also removed /var/lib/apt/lists, but the same error message
E: Encountered a section with no Package: header
E: Problem with MergeList /var/lib/apt/lists/
www.debian-
multimedia.org_dists_sid_main_i18n_Translation-de
appears after an apt-get update
gilde