Hi just some info that might help i have been asked to sort a xl v9 and have formated internal and installed BMWdrivers 9.541 and ttconv-9 following install info ie renaming PNDNavigator and data_im1.chk installing ttconv files in correct place have tried other combinations with no success so far this has been stable for 5 days hope this helps my chip is gl1 sharp is yours the same