2004 Lexus LX 470 Display the outside temperature in centig

I bought Lexus LX 470 model 2004 from USA The vehicle is display the outside temperature in Fahrenheit what should I do in order to make the car display the temperature in centigrade
As per the user manual for the car the unit shown on the display can be changed using the Following procedure:
1. Hold down the "MODE" button until the unit flashes.
2. Push the "RESET" button to change the unit.
3. Push the "MODE" button.
When you change the unit shown on the trip information
Display, the unit on the outside temperature display is also
Changed.
The problem there is no MODE button in the car!!