I'm about to buy the 2015 navigation DVD for Europe as my original 2007 DVD is no longer working (showing DVD unreadable or starting navi forever)
I've read something that you need to have at least C level software version for this to work.
Checked mine, it seems to me that it's the newest that's available to PCM 2.1. However I the information on those systems is very limited, is there anyone here who can tell me if I'm getting it right?

I know it's already an old system that often throws errors, but I like how it fits the interior look.

P.S. There are some exclamation marks shown to every component except navigation, should I be worried?

PCM: 06324AD1 / 3206
System Software: 06324AD1 / 3206
Amplifier (I have BOSE): 00016457 / 3804
CD Changer: C38 / 3003
Navigation System: 00174436 / 2906
(The target field is blank everywhere)