Isdera 112 images are rare but this is one I hadn't seen before, it's in a dealer and it looks recent-ish. Surely someone somewhere knows where and when this was? Also, someone took some proper photos of it fairly recently too, here: http://www.volmeyer.com/isdera-commendatore-112i
I liked the C112 better tbh, because it had those recognizable late 80s/early 90s Mercedes-Benz cues in the concept