How did Cars.com’s Joe Wiesenfelder secure special access to the Cadillac Converj concept? Well, that’s for us to know. You, on the other hand, can watch the video. Wiesenfelder points out all the particulars of the plug-in hybrid, which is a potential luxury complement to the Chevy Volt. Get a close look at everything from the solar-paneled roof to the design (and Wiesenfelder has a specific request for GM about the Converj’s design).