I have addresses that work on my phone but give an "address not found" in the car nav, such as this one
1002 Airport Way S
Seattle WA 98134
I suppose I could start permuting the S around to see whether 1002 S Airport Way or 1002 Airport Way South work better. As many of the addresses around Seattle and Bellevue have NE, S, E, etc., this could be a nuisance.