Sent from a Galaxy 5 light years away
UPDATE 6/2/14= Fully enable driving mode on your GS5 by:
1. Downloading SQLite Editor
2. Go to apps-->Settings storage-->settings.db-->system
3. Search "Driving" and change all values to 1 (see screenshot)
4. Reboot and profit!!
**Credit to @drteeths for finding this!**
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