I have no idea how the Bundeswehr disposed of their Iltis vehicles, but the German Panzer Museum in Munster has at least one Basic Iltis on display. The Panzer Museum has an exceptional collection of vehicles all nicely signposted and arranged in tank sheds. Only half-a-dozen vehicles sit outside with the massive collection housed in a series of themed hangers. This Iltis was photographed during my April 2014 visit.
How refreshing to walk into a museum where the vehicles are fully restored, cared for and don't look like they have been recovered from a scrap-heap and painted by kindergarten children. As well, the vehicles have not been stripped of parts by disrespectful rubes nor used as interactive amusement-land playthings. Former Bundeswehr personnel were on hand in the last gallery to explain the different vehicles and escort very small (two or three) groups of people into selected vehicles for more detailed exploration.
All of this in a museum that has only been open to the public since the mid-1980s.