According to OFDb.de (which is pretty much the best source of information regarding German releases) Turkish subtitles are only on the SE-DVDs, not on the GOUTs:
http://www.ofdb.de/view.php?page=fassung&fid=242&vid=182217
http://www.ofdb.de/view.php?page=fassung&fid=243&vid=182220
http://www.ofdb.de/view.php?page=fassung&fid=244&vid=182221