January 20th, 2014, 04:21 PM
Join Date: Aug 2011
Firmware: Danvdh GE 4.4.2
Carrier: EE UK (4G)
Thanked 1,711 Times in 1,048 Posts
Go into settings, Bluetooth, then tick the box to make your device temporarily visible.
Then on your car stereo, go into its phone/bt menu to add/scan/search
Your s4 will sound a notification and you enter the code shown on the car stereo.
Once entered, the s4 gives your the option to download your contacts to the car.
After this you will be permanently paired and as long as you keep bt on on your handset, it will automatically connect each time you enter your car