Wrong. The first Bible in German LONG pre-dated Luther.
Ulfilas (ca. 381)
The earliest Germanic version of the Bible was Ulfilas' Gothic translation from Latin and Greek. From Ulfilas came much of the Germanic Christian vocabulary that is still in use today. Later Charlemagne (Karl der Große) would foster Frankish (Germanic) biblical translations in the 9th century. Over the years, prior to the appearance of the first printed German Bible in 1466, various German and German dialect translations of the Scriptures were published. The Augsburger Bibel of 1350 was a complete New Testament, while the Wenzel Bible (1389) contained the Old Testament in German.
Gutenberg Bible (1455)
Johannes Gutenberg's so-called 42-line Bible, printed in Mainz, was in Latin. About 40 copies exist today in various states of completeness. It was Gutenberg's invention of printing with movable type that made the Bible, in any language, vastly more influential and important. It was now possible to produce Bibles (and other books) in greater quantities at a lower cost.
First Printed Bible in German (1466)
Before Martin Luther was even born, a German-language Bible was published in 1466, using Gutenberg's invention. Known as the Mentel Bible, this Bibel was a literal translation of the Latin Vulgate. Printed in Strassburg, the Mentel Bible appeared in some 18 editions until it was replaced by Luther's new translation in 1522.
http://german.about.com/library/weekly/aa030600a.htm
Hmm, Interesting! :)