Thanks Kev. These electrical/electronic faults do frustrate me. I have not had time to properly investigate yet, but a week or so ago I tried locking the drivers door immediately after entering the car before inserting the key in the ignition, and noticed that the tailgate glass did not pop open when I started the engine. I did that a few times with the same result, and now I am using the car normally, and so far, touch wood, the fault has not re-occurred. No doubt, having now said that, it will go wrong tomorrow morning! Best regards, Barry