Go into Engineering Mode (press upper left MMI button for 5-10 sec, then press upper right MMI button until it changes) and to see the Navi version and Audio version (under General). Then check the INDEX.TXT on your update CD to get the SOFIDX. Post the values here then we will see what's going on with your unit.
Just to confirm, you said that your original 2005 US DVD works with your unit but a 2006 copy doesn't, correct?
Just to confirm, you said that your original 2005 US DVD works with your unit but a 2006 copy doesn't, correct?