Got the following link from CNG-Driver:
The new Mercedes B 170 NGT was presented at the IAA 2007 according to this link :
http://www.gibgas.de/german/aktuelles/php/index.php#241
available from June 2008.
How strange that we have not heard about any news in the CNG-car area in the swedish papers... They focus more on the cars that we might drive in the future but not the cars we can drive already today or next year.