"Humvee which is cheaper and better vs the German vehicle"
First of all if you look into the G-wagn you‘ll find that its a very good vehicle, and in many ways its much better than the Humvee. The Humvee is a gas pig and cost more in repairs. They didn‘t bid in the Iltis replacement program, so I don‘t know if the unit price would be cheaper. But I highly doubt.
The Mercedes G-wagon, had around for for 20 years. I only wish the Government would buy more of them.