On acceleration and cruise, I have an intermittent low volume buzzing / squealing noise which I thought was a belt but they were checked at the dealer - no problems they say. Any suggestions on where to look next would be appreciated.
If you can hear it in the speakers, and it comes and goes with the rev of the motor - it might be a groundwire in the sound system. That happened to me once with a 300z I had. The local stereo shop was able to find it and relocate it. Good luck, it was an annoying problem.