Thanks for the idea. I found that I was over engineering the whole idea between Tasker and Trigger. After reading your reply I figured I would only use Trigger. I had to create 2 Tasks in Trigger. When I get into my car I put my phone into the phones car dock (which has a NFC Tag on it) . 1 triggers via NFC which turns on BT and connects to my Cars BT,disables wifi, enables Mobile Data and opens Waze or whatever navigation app I want. The other Task does the reverse when disconnecting from my Cars BT (aka getting out of my car and taking my phone with me). After various tests its about 99.99999% accurate. And I works with only 1 initial NFC tap.
Thanks again for the idea.