My car will beep every 15 minutes when the washer fluid is low. “Low” being some arbitrary value, and not even remotely close to empty. Last time it happened. I had just started on a long motorway drive on a clear day and it just pinged and pinged and pinged. The beep is actually louder and harsher than the emergency anti collision break alert.

I’ve also never used as much windscreen wash in any other car as I have in this one