Got my transfer case fluid changed out yesterday and reset the error codes via Foxwell. Not sure if this also resets "adaptations," but at least my fluid wear code is cleared. haven't driven it yet so not sure if it will ride any different. Old fluid was definitely past it's "use by" date. Took almost the fill liter of fluid.
Oh, and here's what you do when you realize you don't have a transfer pump after draining the old fluid... Short hose gets hooked to compressor to pressurize bottle. Long hose goes down into the fluid at the bottom of the bottle and the top part goes into the fill port of the transfer case. Kind of fiddly to modulate the air coming from the compressor... but it works.
Oh yeah, also changed my rear wiper to the e70 wiper arm version. Looks much cleaner back there. The plastic looks a little too grey though so I may hit it with some SEM trim black paint.