(30 May 2014, 2:20 pm)Dan wrote The information I got on the vehicle's specs were from this article, admittedly published in November 2012.
No dual-door configuration Citaro Ks have yet been manufactured, though?
There is Dual Door Citaro K in London in the form of BU13 ZVE
https://www.flickr.com/photos/londonbuses1/10174255653/