X5 is beeping, what feature did I turn on?

[Ambrosius]

and how do I turn it off?

As I am driving, my X5 beeps at me. I look down at the display and it shows 4:59 pm and it goes away, about 10 seconds later I see that the clock on my radio changed to 5:00 pm. It seems to be happening right before the hour every time I see it.

Does anyone know what this feature is and how do I go about turning it off?

Ambro