Well that's a positive outcome - little details like these aren't made clear to your every day car driver, which is surprising considering what can go wrong. At least now you know and can sort it. I hate to think what would happen if a tyre gave up on you at 50mph+ in a Unimog... I'd imagine holding on to it would be quite a challenge and if it goes over the roll over protection in the older models isn't too handy! All in all it's not going to end well unless you're very lucky.
Do you need V-tread tyres? If not then there are options that offer much better road wear. I'm told in the V-tread world you either want Mitas AC70G or Michelin XM47. Apparently the Mitas wear slightly better out of the two - it's what I aim to fit to my 406 when I can afford them. Until then I'm on MPT MIL's and MPT81's. They're ok but look like they'll not be the best off road.