I recently retrofit Nav and my BMW indy shop tried to code the "Nav Retrofit" option when done (they dont have a GT1--they have the other system made by the UK company--I forget the name)...

Anyhow, the "retrofit" coding did not work... But they went and added 609 to the options list in the car and then rescanned all the modules... We were kind of flying blind doing it... Is there anything I should check to make sure its working right?

I have an e46 and the entire system (MKIV, CD, BM53 radio) came from an 05 e46 m3...