I do not have a "scan update now" option. This is in a F150 but sync 3 should be sync 3My Wi-Fi would not update the latest software til I did this:-
Firstly turn on ignition.
1. On sync screen touch settings.
2. Touch general.
3. Touch WiFi updates.
4. Touch 'scan for updates now'.
5. When it stops scanning a progress bar should appear with a message 'installing JRT....etc.'
Then turn off ignition and leave car for 30 minutes or so coz WiFi will remain connected for around 30 mins with engine off if in WiFi range.
6. After around 30 mins. check progress of installation after turning ignition on again. In my case it was half complete so I turned the ignition off and left it for another 40 minutes and it was done.
In your case you should end up with sync3 version3, build 19205.
If you are registered at your Ford owner website your profile should now 'magically' show that you have the latest update or similar.
If you have already tried this I apologise.
Please advise accordingly...Thanks.. 😉