How to Get Serial Number on Screen Using "Dealer Mode"
Uconnect 8.4:
Hold the up, down, and front defrost buttons simultaneously for about 5 seconds and then you are presented with the "Dealer Mode" menu.
System Information
Radio Part Information
Serial number
OR
Press and hold both the temperature-up (red arrow) and temperature-down (blue arrow) buttons at the same time, for 5 or so seconds, you are presented with the "Engineering Menu."
System Information
Radio Part Information
Serial number
UConnect 8.4 NEW from +2019:
Press the bottom left and the bottom right edges together and hold until it goes into dealer mode. Do not press the buttons on the screen; it has to be below them.
System Information
Radio Part Information
Serial number
Uconnect 12:
Press the bottom left and the bottom right edges together and hold until it goes into dealer mode. Do not press the buttons on the screen; it has to be below them.
Press and hold both the temperature-up (red arrow) and temperature-down (blue arrow) buttons at the same time (driver's side), for 5 or so seconds, you are presented with the "Engineering Menu."