The Mégane II Owners' Club

Right. This is going to sound weird. No mechanics have a clue as to what the problem is so far.

I have 1.4 16v Extreme 56 plate.

So I start the car up. Sometimes it idles. Sometimes it idles and the revs drop and the car stalls. This can happen when the engine is warm also. Once the car is started, I drive let's say, 200m down the road, come up to a junction and the car tries to or does stall. After that it drives perfectly fine.

No error lights, no sounds or noises that indicate anything.

I'm bamboozled so I would be greatful for your help guys. Thanks

(I've reset throttle body, cleaner into the petrol system and I only use BP unleaded petrol)

This might not be your answer, but try removing and cleaning the throttle body, then carry out a reset. It helped with mine.

Io cleaned my throttle body with a bottle brush and carb cleaner and it stopped my issue that was very similar to this. Also change the air filter at the same time to prevent this happening again.
I have the same car too