I have a 2012 V6 TDI with the RNS-850.
The sat nav didn't work when I bought the car, didn't care too much at that moment since I mostly use Waze anyway.
It came with a old software that said:
"MOST pull update version: VW
So I updated it to the latest one I found.
It now says:
"MOST pull update version: HN+_EU_VW_K0821
MU software: 0934"
Everything works great after the upgrade, the sound is much better etc.
Thought I would try to get the sat nav going so I ordered a new antenna from VW and installed it around 10 days ago.
I've driven approximately 250km with the car since, but haven't gotten a single satellite lock. Still says 0/14 satellites, as it did before the software update and before the new antenna.
I think the nav database version is ECE 5.12.4 or something like that, the original one from 2011/2012 at least.
Any tips on where to go from here to get it going? Is a newer nav database going to help me to get a satellite lock?
According to the maps I'm somewhere between Sweden and Estonia in the Baltic sea. The compass rotates as it should but is approximately 30* off. Same as when I bought the car.
Have a good day