I understood the Nav/Radio system in my 4.8is pretty well, as I retrofitted the Nav system in an e53 that was originally delivered without one. Now I am in need of getting European maps for my '09. I ordered a set of DVDs as I have a CCC system.

However, technology for the entertainment systems in e70s and beyond seems to have accelerated and it took me quite a few clicks, mostly not on this site, to figure out what I have and what the update method is. Without some serious scouting on Google this is a somewhat bewildering topic.

One page I found showed the different home screens for different systems which was an excellent starting point for understanding better what I was looking at.

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2003 4.4i black ext./black int./black headliner (kid's runabout)
2014 535d X-drive, M package, silver/black interior

Sold but not forgotten:
2009 E70 35d, black ext./black int./black headliner (sold 2021)
2006 4.8iS Le Mans blue/cream int./black headliner, SOLD in 2012 sadly...

Other hardware:
2015 Cayenne S (wife's new DD and definitely wroooommmmm)
2016 Tundra 1794 edition crew cab, luxo hauler
2005 Tundra crew cab, weekend hauler. Sold after 150k very happy miles.