Our car has been strange head-light malfunction few times when we drived it in the dark. First i did think, that was some transient problem, but not it isn´t.
When main light switched on (our Twingo´s main light works manually), sometimes low beams bog down and high beams not working! This happened specially after that, if you use signal turn right. Even light on/park/off rotary switch muted...This failure goes away, if you stop the car and shut down main power and start car again. Then everything works again normal.
Today i did call our local dealer/repair and new light/signal turn switch was ordered from the factory.
He says, that is known problem Renault/Dacia cars.
https://www.youtube.com/watch?v=EI9Ao6i9vsg&feature=youtu.be