I have a Blackvue DR650GW-2CH dashcam installed in my Feb '15 S85D. After much experimentation, I have unequivocally proved that the DR650GW-2CH interferes with the RF signal sent from the Tesla charging cable to the Tesla Model S to command the car to open its charge port. With the camera powered on, the charge port does not open consistently. With the camera powered off, the charge port opens reliably. I must assume that the RF signal causing the interference is emanating from the rear camera, given its location near the charge port antenna (on the left edge of the rear windshield). In this process, I have also conducted several tests to determine how to best position the charging handle when pressing the button to maximize the chance of the charge port opening. My conclusion is that you want to have the handle higher than the edge of the rear windshield (where the receiving antenna is) with you knuckles pointing down towards the location of the antenna. I must assume that the transmitting antenna on the cable handle is located opposite to the button.