Mercedes W123 “Hoch-Lang” ambulance as used by the company Spezialkrankentransporte Flensburg (an off-shoot of SKT Bad Wildungen) during the 1980s, as the “inverse fire brigade livery”, as I liked to call it, gives away. But the vehicle was photographed in Hamburg, and is devoid of all markings. How come?
Well, as the story goes, the Mercedes was bought off Spezialkrankentransporte by a Hamburg entrepreneur, Joachim Wendt (one of the founders of the old Ambulanz Hamburg, now G.A.R.D.), and earmarked for use in one of his companies. This would have been “Krankentransporte Wendt” at the time (short moniker KTW, the official German abbreviation for non-emergency ambulances).
A similar vehicle in its natural habitat:
Mercedes W124 “Hoch-Lang” ambulance, the next generation, as used by the company Spezialkrankentransporte Flensburg and actually in service with them:
Please note that these are scans from old 35mm slides from my archives, with resultant deterioration in colours and sharpness.