w.salam.. always, you have to keep OD ON my brother. listen, when you turn On OD, the OD the light will vanish from the cluster meter. and When OD is OFF then you will see OD oFF light in the cluster meter. when you see OD Off light in the cluster meter, that means the car is using only 3 gears (not good for normal driving). When you dont see OD off light in the cluster meter. that means car is using all 4 gears.