How to access the XK and XF hidden navigation diagnostic menu

If your XF or XK is equipped with a navigation screen, you can access a hidden diagnostic menu with the following instruccions:

1. Start the car (you can do this with the key on but you don't want your battery to die on you)
2. On the "Menu" screen, press the top center of the screen (there is no icon there) for more than three seconds.
3. Enter the PIN code:
1. 660: Diagnosis Menu screen
2. 661: System Check screen (DTC code verification screen)
3. 662: GPS Information screen
4.  Touch "OK"

This will give you access to a hidden menu and some more features to play with.