Portofino - How to Navigate to a Phone Contact

I know most Ferrari owners do not use their navigation systems but I would really like to be able to navigate to contacts that are in my phone (my Android phone's contacts sync to my Portofino via Bluetooth and all contacts including full addresses appear in the Portofino contacts list). Unfortunately, when I try to navigate to the address in a specific contact by pressing the address on the screen under the Phone tab, the Portofino's navigation does not recognize the house number so the system navigates to the street address but not any specific house number (so the system could take me anywhere along a given street). If the address in my phone is "123 Main St", they system will not even navigate to Main St, it will just have an error message. However, if the address in my phone is "Main St, 123" then it will navigate to Main St but it ignores the 123. Does anyone know the proper format to enter a contact into an Android phone in order for the navigation system to recognize the entire address including house number? FYI, if the navigation interface on the car is used instead of the phone contacts interface, then the system does navigate to an exact street address because there is a separate field for entering the house number in the navigation mode. The problem with using the navigation system to enter an address is that every address has to be manually input each time and that is why I am trying to use my contacts as the basis for navigating to the addresses in my contacts. Would appreciate anyone's thoughts or suggestions!