When the car start turns on and when I am driving there is an continual clicking or almost percolating sound coming from the dash. This problem has been frustrating because any research I do results in a flood of results about the AC fan. I show in the video that the AC is completely off. It does not sound mechanical like something is hitting something else becuase there is not a consistent pattern to the noise. It does not seem to be impacting the performance of the car but I do find it to be very annoying. I still have the CPO warranty on the car but the sound does not always happen, it comes and goes, and has not coincided with any previous service center visit. Any thoughts would be appreciated.