Trips

When you are in the download phonebook ready mode on the Nav

Go to the phone icon on home screen to bring up the dial pad on Nexus

select contacts from the top right

at the lower right of that menu you should see the option key the one that has 3 little dots select that

then select import/export option

then select share visible contacts

then select bluetooth

it will then send the file to the cars Nav and you should see downloading.

I know it works I use it. But make sure the phone is synced first.