I have 2009 xf and I recently took my battery out of my fob key for about 24 hours. After putting a new battery in it, I got to my vehicle and i could no longer get in it. After I changed the battery It still doesn't work. I was told my key May have been unsynced and needs to be placed in the port area near the hood release to resync it. Anyone know anything about this issue? Thx