Is there a car mode on the phone, and if so, how do I access it?
The LG G2 does in fact have a "car mode". To access it, you need to insert the phone into the car dock and it automatically opens it. It works fine in car mode. The Car dock made for the LG G2 can be found here: Amazon.com: LG Electonics VZW LG G2 Navigation Car Mount - Non-Retail Packaging - Black: Cell Phones & Accessories
What does car mode do?