Cheers for the quick reply
OK steps is to
look for a v29/30 on the forum ,
Burn using Imgburn is Mode2/Form1
Confirm Disk is burn Mode2./Form1

I presume steps in upgrade is the same i.e Turn Key to pos 1, replace NAV disc with new OS and wait >=6 min ....

The OS on the car id V15 which apparently needs a KeyCD . I downloaded from keyCD Download Link on in the Nav section But only contains a bunch of images/files , but dont know what to do with it
any clues on these

Cheers
css_jay99