Actually, I only need to spiral cable module from a facelift model if I want the button lighting to "dim" when the headlights come on. Otherwise, I can still have the illumination on full if I connect the 8th wire to ground in the steering wheel or I could add a resistor or variable resistor to set the amount of illumination.
I think I'll get a facelift spiral cable module though so that the buttons illumination is controlled along with all the other lights.