I have a version B RNS 510 with S/W 1200 and V6 map with the retrofit MDI interface in the centre arm rest using the kufatec CAN Lead.All is well,but randomly when i use my I-Touch to listen to my tunes the display on the RNS 510 and on my Highline display freezes but the playlist continues to play through my songs without displaying the current track im listening to.I have the 'BLUE' butt lead which i was told is the latest.It done this on previous software versions so isnt RNS510 S/W related.According to VW tech HQ in the UK there is a file and you can upload it via a usb stick plugged into the mdi.Please can anyone help me?