I just bought a 2000 TL with Navi and love the car, but the passenger side heated seat is not working. I checked the fuse and its fine. Anyone have any ideas before I bring it into the dealership?

Also, I am getting a steady low level hum out of the sub in the rear deck. Only when the stereo is on and it does not vary with engine speed. Any ideas?

Also, it just turned 60K and I was going to have the 60k service done, but it seems like beyond inspecting a bunch of stuff (which they pretty much do anyways when they change the oil) it seems like I'd be paying $200 to have the transmission fluid changed. Is this right? Would I be better off just having a mechanic change the tranny fluid and call it a day? Thanks.

Brett