I took this photo on April 22nd, 2010 at Franz-Jonas-Platz (near Florisdorf U-Bahn station).
I think it is an Irisbus Crossway 12.8 but I cannot find any other photos on the web and it is not in any of the Dr. Richard fleet listing.
Regards
Michael Taylor
Binbrook, Ontario
http://www.michaeltaylor.ca