I'm trying to get into the iDrive service menu so I can (hopefully) set the Radio to European tuning standard (0.1 MHz step rather than the 0.2 MHz tuning step used in the USA). If I press the iDrive knob for 10 seconds then all it does is that it goes to the next menu but it doesn't seem to get me anywhere! Am i missing something? what key position should is needed to get to this menu? HELP!