Just posted in my plate-collectors-forum:

http://www.urbex-online.de/lost-places/automobilindustrie/belgien-traction-sued/index.php

http://www.urbex-online.de/lost-places/automobilindustrie/ruhestaette-chatillon/index.php

http://gallery.dralzheimer.stylesyndication.de/Lost Places/Autofriedhof/

They are in Belgium, but I haven't checked any details. As the last page contains "SaarLorLux", it seems, that the location is probably in the farest East of Belgium.