It happened just as I was backing out of the driveway. Conditions were rainy. I didn't see any warning light. I don't think it affected my throttle or acceleration, but I was so taken back by the sound that I didn't push the throttle...I just drove very slowly from the driveway and drove to a friends house 1 km away.Did the car slow down/stop accelerating or any warning lights?
The way you described, that is precisely what it is. It makes perfect sense as I know that my CIU has been exposed to water in the past and has messed up my NAV. Thank you FiskerPhilly for your input. Much appreciated.Sounds like the CIU is possibly shorting out. When this happens you can get excruciating loud feedback from the center subwoofer in the rear shelf. It will make a thumping digital sound that changs with vehicle speed. The rainy conditions lean me to think you have water leaking into it. If it happens again lower the rear deck panel in the trunk by removing the plastic clips. Reach in and unplug the center speaker, see if it stops.