Just curious if you've ever considered a Chevy or GMC? Yes, they are more rare than either the Ford or MB but they offer the option of low range crawling along with the smoother ride on dirt roads that IFS provides. I just did 190 miles of dirt road from Crater Lake up to Sisters at the end of last week and was very happy with mine. Good combination of some pretty good climbs along with fairly high speed dirt roads with some washboard.
2015 Chevy Express 3500 Duramax
w/ Quigley 4x4 & Agile Fox shocks
Sold 2005 E350 Chateau
Quigley with Agile RIP, 6.0 PSD