A couple days ago I started getting TPMS needs service. It was intermittent at first, but the error is now permanently displayed as soon as I press the brake to turn the car on. It's not practical for me to wait for an appointment with the SvC since it will probably be several weeks for the first available appt. and also I'm road tripping after Xmas. I've tried rebooting and I've also performed a TPMS reset. Is there anything I can do to clear the error message? Disable the TPMS all together, perhaps? Where can I locate the TPMS receiver module on a classic Model S?