When you look at the actual ZETROS nose, it is obvious that the ZETMOG has its own fantasy going on from the cowl forward.
The flat hood with the strap hinges, the two latches per side - it seems like it is just cobbed together in order to cover the engine.
The exercise is interesting. by installing the Zetros cab, they are sliding the cab and driver's position rearward, making it essentially a conventional cab, and changing it from the UNIMOG's Semi-cabover layout . The UNIMOG might be better described as a 'Short Hood conventional cab'. The Zetros cab does not help the forward visibility at all, while it is excellent with the UNIMOG.
So, it seems to me that the two things that they are buying here are a wider, roomier cab, and a snout. This makes me wonder - are they just experimenting with the larger cab, considering it for future UNIMOG series ? Or, are they also after the snout, which buys them room for a physically larger engine ?
EDIT - research intervenes here - So the above is off track...
That is the sort of stuff I was pondering... then I zoomed in below the ZETMOG badge, and it appears to read :
Based on FGA 13.0. The next one, naturally, reads 'Based on FGA 14.5'.
The thing is, the FGA 12.5 , FGA 13.0, and the FGA 14.5 are the bare UNIMOG chassis that were developed for the DINGO armored vehicles, and other military applications. The FGA 14.5, for instance, is the basis for the KMW heavy duty version of the DINGO 2 HD.
More on this later, as my research is on my phone, and it'll be a lot easier for me to find the same information on the laptop and post it from there.
Now, I think that the existence of the ZETMOGs might come down to this - While the various FGA series are essentially UNIMOG chassis, they are altered for their ultimate destinations , which are not as UNIMOGs. We have photos of the bare FGA 14.5 chassis, and I suspect that in that form, it was not fitting into the UNIMOG bodywork. Since there are apparently dimensional differences, primarily in the engine bay with the size of the radiator required and the rest of the packaging layout, then it may have been easier to plop a Zetros cab on it and build the Frankenstein snout on it than it was to try and make the UNIMOG bodywork fit over it.
I think that the ZETMOG had little or nothing to do with developing future UNIMOGs, nor with the ZETROS. I think it was a test mule for the FGA chassis, destined for non-UNIMOG military vehicles, and they could performance test the system by loading up the weight blocks to simulate the weight of armored bodies and so on. If you look at the profile of the DINGO 2, and the length of the hood, it looks pretty close to the snout on the ZETMOG. The FGA specialty package is configured to fit into a regular cab profile, which the UNIMOG is not, of course. Enter the ZETMOG, whose duty was (I'm saying) to serve as a test bed for the DINGO ( and other) military vehicles which would be using the FGA chassis.
Note that the number code on the radiator is the very similar to the one on the Black ZETMOG - U 437 V 56, instead of F 437 V56, and it looks like the 'U' may have been taped over the 'F'.
That is my theory. We'll see.