Picked up my 07 tl-s yesterday and found 1 small problem. Whenever I use blue tooth with my iPhone 3G I get this faint high pitched whining noise. My aux cable is plugged in, but not in use. Any ideas on what this may be? Should I just take it to the dealer?

 

Whining feedback from the phone BT affects my HFL with current and past Motorola phones when they were placed in the front console compartments.
Everything is fine if the phone is in the armrest or cupholder areas.