Press button h. Each pulse on the button will obtain increase by one unit. Automatic fast increase is obtained by keeping the button pressed for few seconds. When you are near the required value, release the button and complete adjustment with single presses.
See also:
“Distance unit” (Dist. Unit)
The display gives information according to the set unit (km or mi). To select
the required distance units, proceed as follows:
...
Petrol engines
Use only unleaded petrol.
To prevent errors, the diameter of the fuel tank filler is too small to introduce
a lead petrol pump filler.
Use petrol with a rated octane number (R.O.N.) not lower than ...