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Huh. In that case, I’d call national support and they can access your car and see if any error codes are showing anything. Could be a real hardware fault at this point!
That chime beep is so annoying I disabled mine. Bit of a hassle to get the trim pieces off and yank the connector out of the stupid annoying beeper. Also loads of those daft green trim clips will shatter. In theory I think you could prize the speaker panel off and get quicker access. I just got the feeling that panel was going to break so went the longer route.