I've messed with my iDrive for hours on end and as of yet I have not found a thing that allows that... You'd think that BMW would do that. My 2003 VW Toureg had that feature and much older and lesser of a car...
Good call on the programming into the buttons.
2009 E90 Le Mans Blue M3 6MT De-Chromed, AiB V3, Rogue SSK, Brembo BBK, Eibach Pro Kit, Eisenmann Race Black, ESS Tune, MS Filter. 1998.5 Titanium Silver E36 M3 Coupe NASA GTS2 Race Car.