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New chime sound in NoA or 42.3?

while driving home tonight using Navigate On AutoPilot, the car made a “chime” noise I hadn’t heard before. Sort of a “ding” noise with a long decay, and higher pitched than the normal EAP/Autosteer tones.

We couldn’t figure out what they meant, seemed to happen when cars were in our blind spot but not always. Sometimes when we were coming to highway route change but not always.

I’ve never heard those tones before in any app I use, so mostly certain they weren’t coming from my Bluetooth-paired cellphone.

When we drove the similar route away from home on Saturday we didn’t use NoA and didn’t experience those tones. I’ll see if they happen again on the normal work commute this week.

(Model 3, non-p AWD, 2018.42.3)

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