My 2018 M3 started having usb issue after a software update ( I don't remember which one), since then I have had 3 mobile service guys to come to me and had 3 service center visit, still without a solution. The sentry logo is showing on my display but NOT the dashcam, my phone will also NOT charge, these are the solutions Tesla came with:
1- its the usb harness (replaced)
2- It's the rear usb harness (replaced)
3- It's your usb, if you buy the Tesla USB you will be OK ( purchased the 128 GB) I'm still having same problem
Today the mobile service guy told me new stuff, he says you shouldn't see the dashcam logo on the screen because Tesla doesn't want you to play around with it while driving, but when I come back to parked car and it shows
sentry mode event report" I want to know what happened, whats the green 'i' for? he says it's just to inform you some events happened.
Today on the way driving I honked to see if anything saves, i'm checking the Tesla USB now, nothing on there.