This was done on 2002 megane.
Renault megane back door wont lock.
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.
As you changed the lock yourself you will know how to access the lock by lifting the fabric.
This process will work with any kind of megane from around the same time.
Replacing the door lock actuator on the passenger side of a renault megane from 1999.
On most cars if the door will not open the door card cannot be opened without inflicting damage.
Door lock unlock problem post by chrism mon may 18 2009 2 23 pm my card is on its way back from gary at www keyrepair co uk i also had to use my spare seems my card stopped sending a signal to the vehicle however for a 27 charge gary has sorted it out for me card should be with me by tuesday.
When you lock the car which you can do with the buttons on the keycard the buttons on the handles if they still work they were a bit intermittent on my 2003 mégane or the black button in the centre of the renault diamond on the boot lid you have about 3 seconds to check that the doors are locked by pulling on the handles.