Ironically my edge experiences the same problem. I've found that it has to do with services for some reason. Whenever my voice button stops working I hit the connect to services button under the top right tab then hit the voice button when the services computer operator picks up. After I disconnect the call the voice button and sync respond On 9/2/2016 at 9:10 AM, m1tch said: Its a Ford design fault, the wiper box/rods smack against the thin ribbons that power the window heater. Explained here: Expand. With my mk6.5 fiesta I'd say I only see one strip work to heat the front windscreen. I might look into this and see the condition of those ribbons. Googling brings up a number of solutions to this problem which seems to be common with Fords. This one is from AV forums but there are others out there. This sorted it for me - press and hold the central power button for 10 -15 seconds until the display goes blank. It should then start up again and in the two times the problem has occurred on Once you're done resetting, pair your devices again: If all of your buttons are still not working correctly, I suggest removing fuse 10 for about 3 minutes while the engine is turned off. Replace the fuse and start the car back up. Sync is not working in my car so I can't play any music from my phone. I can't access the sync menu to reset. I have tired pulling the fuse and disconnecting YAqf8ds.