Hum...

OK I'll investigate more.

I appreciate that some settings are saved to key and that the normal use of the glove box USB port is to import music to the cars HD.

However the hand over guy, who was pretty accurate with 99% of the info he gave, specifically said that the glove box port can be used to back up ALL settings to a USB stick prior to service, just in case a SW upgrade wipes them. Could be duff gen, I'll post here when I get to the bottom of it.

No such thing as a tech package in the UK but I have all those sort of options :-)