Ive just got home now, and whilst i was sitting in the car i decided to play around with the footwell lighting brightness. i set it to its minimum, then went out of the menu and switched the ignition off to activate the footwell lights.
i then went back onto the menu and now the lighting menu has vanished, and i also now have an option to turn off the display which im pretty sure wasnt there before. and to top it off, when i turn the ignition off and remove the key the lights now no longer come on until i open the door !!
wtf have i done !!