Originally Posted by M3Carbon
Awesome idea Mike! Couple of thoughts...
Switch in the glovebox that can be secured with your "valet key". Allows signal input to be recognized through iDrive (i.e. hidden or repressed coding).
Similarly, utilize USB + memory stick in glovebox to load valet tune. Program initiates upon plug-in; deactivates on removal.
I'll just add to what M3Carbon stated...
It would seem that if the cars can determine (all electronically) that the Trunk Lock switch in the glovebox has been enabled (thus disabling both the trunk release button by the driver's door and the pressure pad on the trunk lid), that perhaps this is the easiest way to enable this Valet feature without constant re/de-programming (assuming it can live dormantly along-side the daily driving tune)...?