Anyone familiar with the diagnostics menu? I entered it in order to drop back to a previously used sat nav dvd as I was getting disk reading errors on a replacement one. Managed to do this but could not get out of the menu, stuck on a part that required choosing between left or right handle. Anyone know what this refers to please? I have now been able to exit the menu but I am curious for future reference. Is there any info available on the diagnostics menu? I appreciate it is for the dealer really but it is nice to enhance understanding and knowledge of the vehicle.