The question here isn't turning a rwd into a awd, as stated above.

The original question was, since there is a wiring harness in place for the snow mode button on a rwd G, will hooking up the switch and setting to on cut the power to the wheels as it does in the awd model.

6MT's can start off in second gear. The 5AT folks could benefit from this when trying to start off on an incline. The G loves to snap necks on takeoff even when you don't try. Snow mode would help in this situation.

 

a little OT but, can the 7AT start in 2nd gear? cause my friend's 335i 7AT DSC can.