If your car has Bluetooth and you have just updated your device to Windows Phone 8.1 GDR1, you need to head over to your car right now and try this out. Update 1 has added a neat little feature that lets you activate Cortana directly from the voice command button on your steering wheel. Such a tool is useful for finding local eateries, gas stations, parking, or just looking up information while driving and avoiding getting a ticket.
How do you set it up? Read along and follow the steps.