Firstly, apologies I have searched for the answers but to no avail. If I retro fit an RNS to my B7 A4, will the DIS display track names from the SD cards? Will it show nav directions too, or do you need the colour DIS for that? My car has OEM Bluetooth fitted, will the RNS still work with it and the MFSW, obviously it will need coded too? Does the version if RNS matter or even are there different firmwares? Thanks folks!