Hi there, Here is a problem for you, I have a A4 Avant, 98 plate that has the old alarm system installed, without the battery back up. The problem I have now is with the remote control for the central locking. It does not appear to be original to the car. It has stpooed working, tried new batteries, no joy. An ideas on how to reprogramme it to wortk. Here is a picture. Thanks o be an original.