Colin from Woking

I have just purchased an ex-demonstrator GS450H. It is the face lift version and was registered in January 08. I took it back to the dealer today (Guildford) as the reversing camera image did not have the park assist guidance lines. Depites the sales documentation and the user manual saying that the car has it, I am being told that it has been discontinued. Can anybody tell me if this is correct? Does anybody have a new GS450H that has it? Many thanks