For anyone still reading this... I checked whether my Garmin 660 is "plug&play" in a K1600. It is. Installing any GPS in the panel mount is... so... what? BMW. Raise the windscreen, push a button on the dash next to the [=6=] thingie, watch a "cartridge carrier" rise majestically (not just pop! up) from behind the dash, and remove the [=6=] panel. The 660 goes in the plug/carrier bit, push the 660 back into the carrier, and voila!. Sooooo BMW...
The BMW warehouse inventory of '16's is thinning out, but the '17's aren't available yet. "Sometime next month"... heard that before, elsewhere...
