Originally Posted by Babe
it is the hourly reminder. it has small beeps reminding you at the top of every hour. you can turn it off. if you have i-drive, it is in the setting.
Drove me crazy too until I determined what it was, the following is from my manual:
Switching on the hour signal*
You will hear three tones just before each full hour.
Select "Hour memo" and press the controller.
The hour signal is activated.
2011 X3 xDrive35i F25 (CPO) Space Grey/Black Leather, Packages: Premium, Cold Weather, BMW Apps, Sirius and Technology. BMW CCA Member (WindyCity Chapter). Former cars: 06 750i E65 (CPO) 07 E90 335i (bought used but had problematic iDrive so sold it to get 7-series)