This process will work with any kind of megane from around the same time.
Renault megane back door wont lock.
You are unfortunate that the megane 2 will allow you to remove the upper fabric part of the door card.
This was done on 2002 megane.
Replacing the door lock actuator on the passenger side of a renault megane from 1999.
I put together a how to guide to.
This video just shows a quick way to open a megane rear door if the child locks are on and the door handle breaks a common fault.
Renault megane door mechanism repair.
As you changed the lock yourself you will know how to access the lock by lifting the fabric.