There are at least 5 registered M715 in Germany, 1 in Schweden, 1 in Belgium, may be 1 in France . I do not have the complete overview in Germany, however I estimate that there are some 15 at least in Germany. May be 2 more in Portugal, which had once been sold as Farm Trucks to there (30+ years ago). So including the hidden vehicles, there should be some 30 at least in Europe, may be 5 or 6 Ambulances left. I know about 3 of them as Ambulances, at least one Ambulace acutally with the wrong Pick up body according to the chassis.
Hope this helps.
Wolf