I did a Discover Media MIB2 retrofit on a 2010 Passat B6 which had RNS510 with voice control and the mic still didn't work. The problem was from the quadlock adapter - the pins were inserted in the wrong place. On the car side of the quadlock adapter the pins for the microphone were inserted in positions 6 and 12 instead of 1 and 7 and on the MIB2 side of the adapter the positions were correct but the + and - were reversed. I moved the pins on both sides of the quadlock adapter and now the mic works.
The only problem that I have is that I cannot load the maps. I bought an used original VW maps card from
ebay, the unit detects that there is map info on the card ("The source contains the navigation database" message appears) but in the NAV menu It shows "The navigation database is not available".
I've read somewhere that these cards are "married" to one car / DM, so if they were used before they cannot be used on a different car - probably an anti-theft measure.
I tried writing the map info on a new, 3rd party SD, the DiscoverCare app sees the card, the map info is loaded, but the DM doesn't see the card.
Does anyone have any ideea if and how can the maps be loaded or must I buy a new original card from VW (~80 EUR)?