Ummm...Nice avatar!
I have those wheels on both of my DOKAS. I did some checking with some dealers in Germany on the same exact issue, and the word was
"MB does not recommend that fitment" or some such language....
HOWEVER, more checking led me to HELLGETH, and they have fitted those rims to a number of SBU's ....SO, I re-contacted the dealerships with that Information, and BOTH dealers responded : " OH, Well if the HELLGETHS
do it, that is a different story..we defer to them...They know what they are doing..." or language to that effect. They definitely have earned some respect in the UNIMOG world in Germany.
In dealing with SEAN during the purchase of the Green truck, I pointed out the WHITE DOKA on the HELLGETH website, and Sean said, "no problem, that thing is on drum wheels and I can get it set up that way for you...."
SO, I got the wider front fenders, made brackets to move the rear fenders out 3" and have been very happy with the set-up.
Yes, because you are increasing the track width, you are increasing the load on the kingpins and so on...but when you look at some of the loads these things carry, and are designed to carry, a camper or a dump bed , unless filled with lead ingots, should not overtax the system, in my opinion.
If you pick up some of the UNIMOG books that are filled with photos from around the world and spanning decades, when you start looking for" DEEP-DISH" wheels, well, you'll find they are in wide usage, with full implement loads. It seems that people have been running them for years, at least.
I have 3 sets of them, but I could use four, if you just can't stand them.