It's not the most exciting video, but I happened upon this when I was trying to reset my trip mileage and kept the "OK" button on the steering wheel pushed when I turned the ignition on. A neat little hidden menu comes up for what appears to be a self-diagnostic mode. Aside from the DTCs (troubleshooting codes), I'm not sure if there is anything really of use. I don't think we can really change any of the settings for tuning here either.
Upon further investigation I found this at mr-fix.info (for a Ford Focus, but I suspect all of the newer Fords have this capability and have something similar):
Gauge sweep
LCD display test
LED indicators test
Chime test
ECOmode – status of the economy rating function
HW – hardware version
App – software version
NVM EEPROM – non-volatile memory version
Manufacture
DTC – diagnostic trouble codes
Speedo gauge – vehicle speed in km/h and mph
Tacho gauge – engine speed
Odometer
Fuel% – raw fuel love data in HEX
Fuel flow
Engine temp – coolant temperature
Battery – voltage
Dist. to empty – estimated distance to empty tank
AFE – average fuel economy
RAFE – running Average Fuel Economy
AFE Bias – adjustment of the fuel economy calculation (default: 1000).
A/D Input – values from analog and digital inputs.
