Hi i have got the same problem with my remote. (Car stuck in a car park.) I have found out that i need to get the 4 digit pin immobiliser code from a renault dealer. You need to give them the 17 digit chassi number. This is how to do it. Switch ignition on and the red led should be flashing fast, now say your code is 1234 while the ignition is on, you need to press the central locking button and count 1 flash of the red led, then let go of the button, then press the button again, and count 2 flashes of the red led, then let go of the button, and so on till all four digitd have been entred, when you have entred all the digits, if the code is correct the red light will stay on, if the code is incorrect or you have done it wrong the red led will flash, once the code has been entred and is correct and the led has stayed on, turn the ignition off then press and dold the central locking button untill the central locking makes a noise by locking and unlocking the doors, then point your pulp key at the receiver in the roof and press the key 3 times if all goes well the key will have been reprogrammed, if not just put the key in the ignition and the engine should start, if the remote is not working every time you want to start the car you will have to entre the immobiliser code each time to dis arm the immobiliser. If that fails you will have to take the car to a dealer for them to reprogramme it for you they normally charge about £30. hope this helps.
Debs, May 2006