Don't use tocbibind with KOMA classes like scrartcl. From the .log file:
Class scrartcl Warning: Usage of package `tocbibind' together (scrartcl) with a KOMA-Script class is not recommended. (scrartcl) I'd suggest to use options like `listof=totoc' (scrartcl) or `bibliography=totoc', or commands like (scrartcl) `\setuptoc{toc}{totoc}' instead of this package, (scrartcl) because it breaks several KOMA-Script features of (scrartcl) the list of figures, list of tables, bibliography, (scrartcl) index and the running head.
Use a class option instead. In this case bibliography=numbered.
\documentclass[bibliography=numbered]{scrartcl} \usepackage[ngerman]{babel} \usepackage{csquotes} \usepackage{biblatex} \usepackage{lipsum} \bibliography{biblatex-examples.bib} \title{Testdokument} \begin{document} \maketitle \tableofcontents \section{Erstes Kapitel} \lipsum \cite{sigfridsson} \clearpage \printbibliography \end{document}
The compatibility between KOMA script options and biblatex's headings was improved recently. Earlier versions of biblatex could only deal with KOMA options if they were given as global class options (because biblatex intercepted the options), newer versions hand control over the bibliography heading over to KOMA script. You can read more about that in Add bibliography to toc with KOMA-Script.
Note that \addcontentsline{toc}{section}{\bibname} would have been wrong anyway since it writes the last page of the bibliography to the table of contents.
If you don't use a KOMA class tocbibind still does not do the right thing (it does not produce a warning, though). tocbibind does not work together with biblatex at all, in that case you should use the optional argument heading=bibnumbered to \printbibliography
\documentclass{article} \usepackage[ngerman]{babel} \usepackage{csquotes} \usepackage{biblatex} \usepackage{lipsum} \bibliography{biblatex-examples.bib} \title{Testdokument} \begin{document} \maketitle \tableofcontents \section{Erstes Kapitel} \lipsum \cite{sigfridsson} \clearpage \printbibliography[heading=bibnumbered] \end{document}
The optional argument \printbibliography[heading=bibnumbered] also works for KOMA classes, but I prefer the class argument in that case (if you decide to switch back from biblatex to BibTeX bibliographies, for example).
