a few hints for finding a dojo in Germany besides aikiweb's search engine.
A good address (though in German) is www.aikido.de
with links to many dojos and all organizations' websites, who also maintain their own dojo directories.
On Maps for Germany:
-> fin the link to "Routenplaner"
and type in your City or Zip code under "Stadt", then it works like any other.
Those two I found with no effort on the web, others may be there also:
Kaiserslautern (10 miles)-
Saarbruecken (35 miles)-