Arnold Wagner being interviewed in Winterthur, Switzerland during the filming of the Top Gear Oekomobil feature in March 1988. Behind is his eldest son Felix sitting on a standard BMW K100RS motorcycle, and behind that, his creation, the Peraves Oekomobil cabin machine. (The name was later anglicised to Ecomobile).
Photo: Screenshot
Video here:
https://www.youtube.com/watch?v=sH7ci0UTaaI&t=12s