2015 Sprinter 4x4 price and build: +$6500 or $6800

The funny thing is that those prices are not really out of line. It requires the OM642 6 cylinder so that is another $910... but it is understandable because the four-banger's engine/transmission likely wouldn't cut the mustard.

Of course, The $6800 is the way to go. 4-Low is something very much worth having.