Here’s a Unimog mash-up from ebay (via Bring a Trailer). The truck is described as a U1300L with a U1500 sourced 5.7-liter, turbo-charged, six-cylinder diesel. The ad states 72,302 for the the odometer reading.
If you go for this check it out well, given engine swap. The buy-it-now price is $28,500 and there are just about 3 days left on the ebay clock. The truck is located in Colorado.
More photos, and the original ad text after the jump.
Links:
ebay: 1978 Mercedes-Benz Unimog
Bring a Trailer: 1978 Mercedes-Benz Unimog U1300L