Menu 2 On/Off function
This function allows disabling "OFF" Menu 2 (B) / re-
enabling "ON" Menu 2 (A).
When Menu 2 is disabled, the average consumption
(CONS.AVG), the instant consumption (CONS.), the
average speed (SPEED AVG), the trip time (TRIP
TIME) and the air temperature (AIR) functions will no
longer be displayed on "main screen".
Meters will nevertheless continue calculating all
these functions so that, once Menu 2 is activated
again, all data will be updated and consistent.