I hope I don't burst your bubble William but that's the "standard" WA-0492 sizing/offset that Hutchinson sells retail/civilian. That doesn't mean it isn't also THE military sizing/offset too, but there are only 2 G-Wagen Hutchinson's available to the public currently;
WA-0492 like you have (16x7.5" 63et, 84.0mm centerbore, 6.82" backspacing, 40.1lbs) or WA-1207 like I had (16x7.5" 37et, 84.6mm centerbore, 5.83" backspacing, 35.6lbs);
http://www.high-impact.net/wheels/dot_approved_beadlocks.htm
(You should have the spec.pdf in your Hutchinson paperwork, but if you don't, I can email you both of these with all their respective info).
Notice the WA-0492 will have even less hubcentricness than the WA-1207. IIRC the '02+ MBUSA G's have an 85mm or 85.5mm hub bore, I'm not sure what yours has. But Hutchinson corporate swears up and down their engineers measured the vehicle hub bore at 84.6mm--bah, they either didn't measure an '02+ or their calipers need to be calibrated! All in all, you're going to have to do something about the 1-1.5mm of slop between outer bore of hub and inner centerbore of wheel, in order to minimize steering wheel shimmy. I resorted to using gaffer's tape on the inside centerbore of the wheel and while the rear of the G was on 2 jack stands, using a Go-Jack to lift the RR or LR wheel/tire up perfectly to where I could then slide the wheel/tire onto the hub/rotor(best centering the wheel/tire onto the hub), and then evenly tightening the lugs. Yes, quite the process since Hutchinson didn't nail the centerbore of the wheel.
Tony at Motorsports here in Portland OR has a plan on how to resolve this issue with hubcentric spacers. But the wheels would have to go to him to be modified; 503.244.9010