Automotive: I thought the Red Label...
...designated the 6.75 engine? In any case, I don't think BMW engines appeared until the Arnage (and then very briefly...VW/BMW/RR/Bentley kerfuffle era)
An admirable vehicle, as long as you are not bouncing around in the back.
Automotive: I have driven a Unimog...
...and completely agree with Mike. The only saving grace of the geared hubs is the ground clearance, everything else is compromised, a truck on a truck.