Good deal. Plugging a tire is considerably less expensive than replacing a wheel bearing. Trust me on that.

 

my dad had the s4 couple years ago and i dont remember the awd being noisey

 

I have the same noise as you described. I am also driving with Falken Z512. Prior to this it has the GoodYear and no noise. It could be a combination between the tires you have and a nail. Keep me posted if you still getting the same noise.
e-mail me at marioajavier@eaton.com.