Hello folks,
I've finally purchased a 2006 X5 4.4i with 60K miles CPO till 100K
Quick question that i notice - everytime i start the car and take off driving; after a few minutes or lets say about 2 or 3 miles i get 3 beeps but no warning lights or anything. The service indicators have no lights either when starting.

The beeps sound like when i backup or come close to an object while parking.

what could it be?
thanks for any help