Subaru 2009 Impreza Navigation System - Manual (Page 212)

212 Handsfree
Using the phone book
The phone book data selected is deleted. Deleting all the phone book data
It is possible to delete all the phone book data.
NOTE
Phone book data once deleted cannot be restored to their original state.
1
Press the button.
2
Select (Phone).
3
Select (Phone Book).