You can change the country settings, im not sure how changing it to USA will work, as i said American cars have 2 bulbs in the indicator unit or they have a double filament bulb, 1 filament for light 1 for indicator. What you have to make sure is that the indicator flash's and when it does there must be no other orange light in the unit, in other words the indicator must flash and the sidelight must go out till the indicator is cancelled.