Question. I want to know all the menus that can be set in the 4th generation Prius. For example, display for mile-> km, avg. L / 100km-> km / L Is this change possible?
I didn't see that in the Carista menus when I connect my Gen4 to it. Customisation is very very limited, to what the user's manual says, essentially...
If you're in KOREA and the standard of measurement there isn't l/100km (I suspect it's km/l), talk to your dealer - they should be able to set your car to use the units correct for the country it is sold in. If not, contact your local TOYOTA.
For the US 2016 Prius I only see how to change both the speedometer & economy between miles & Km. Some early 2016 US Prius (manufactured before February 2016, I believe) lacked this feature which causes issues for those travelling between the US & Canada. Perhaps your Prius cannot be changed. If I were you, I would take the advice of @alanclarkeau. . The dealer should not charge you since the vehicle is under warranty.
Mine has no options (that I've found) as our country's measurement standard is l/100km which is what it's set for.