Interesting all thiese infos around audios..I must admit it was not the part I investigated much....
1. I guess the Navigator III has got the exact same connectors at the same place no? So the sames applies for the original Navigator...but pins 7 and 8 of the large Garmin connector gives audio out and I know some Y connectors with a jack connected to it...(look at http://www.maxbmwmotorcycles.com/fic...p?mospid=48142
go to Radio,special equipments and then click on 'Connect Cable for navigation Systems).
Further, the NavIII gives the audio out thru Bluetooth...but was confirmed to be in Mono.
2. The original craddle is usefull for the large 4 buttons usable with gloves and fits
the original K1200S OEM cabling (it comes with a bike specific connector + Y 2 connectors: 1 for the craddle, one for the unit, both being interconnected for powering the craddle and serial data exchange for operating the unit from the craddle)
Interesting deature is the odometer link so that you NEVER loose track even in tunnels (just like original GPS in cars).
3. Yes, the smart Garmin craddle is far less expensive...saw it arount 25 bucks in US resellers
4.Yes indeed...but you loose the usability of the large tank bag...which is not so large already.
5. Here is the link (in English) for firmware updates from BMW :
Never found the one from Garmin.
The Webupdater just tells you that the present software in your unit is up-to-date.
I am still bidding for a used BMW craddle...or I am ready to ship my brand NEW (in the box) original craddle from Garmin against a used BMW one (and I add some bucks as well).