I have the chirpy sound.. It seems to be the bit of trim that runs up the side of the window (b-pillar side) It doesnt fit flush at the bottom, the bit where the door pin would be.
If you hit it back down it shuts up for a bit!! The driver side is flush and doesnt squeek. A guy at Renault has a 172 where the same bit of trim sticks up, probably a batch that got through quality control!
Oh, and i have a squeek at the bottom of the A pillar, passenger side also!!
I need a louder stereo...!