It's easy on the 14-16 LR4, just look at the interior photos to see if the selector for low range is there and if there are four or five special program icons on the 4x4 panel. I've also become pretty good at determining option package from interior pics like lux/non-lux and if it has the cold weather package (heated windshield/steering wheel). I had thought the extended leather came with the lux package but found that to not necessarily be the case. friend of mine's wife has a 12 hse/lux but no extended leather package. You could also spec the 2-speed tcase individually but i bet you'd have a hard time finding one with low range and no locker.