We don't have a manual for this vehicle because it is not offered in the USA but I tend to agree that the idle air control is the issue. Due to not having a manual, I can't verify this. I attached a picture of what I found for this part. I just don't have a repair guidance.
Here is the part number that I show for a 1.6L Megane: 7701047909 D95174.
The other possible cause is a dirty throttle body so I would suggest cleaning this as well.
https://www.2carpros.com/articles/throttle-actuator-service
Lastly, here is a guide that goes through the other basic causes of a stall at idle:
https://www.2carpros.com/articles/stall-at-idle
Run through all this material and let me know if you have questions. Thanks
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Sunday, April 5th, 2020 AT 7:03 AM