dialled and received number stored?

[2dino]

Hi,

Newbie here.

We have our 09 c350 with bluetooth phone function (not Command).
Would like to whether phone numbers called out or received in using the BT system are stored onboard at all or it is just displayed realtime via the phone.

EDIT:
Reread the manual and found out the call list is stored in the audio system independent of the phone.

Now the question is:
- how `permanent' is the DELETE CALL LIST function?

Appreciate information from folks in the know.


Thks,

2dino