Hi Karl, I have not changed the battery and cannot see any documentary evidence of it ever being changed - I will need to look at the battery itself later. However a battery problem could explain the issue as the open/close clicking always seems to occur after the car has been left on its lonesome f...

I have just experienced the same problem on my 2000 XKR... started with the open/close clicking when unlocking then eventually fob refused to unlock. Had to manually lock passenger door then use key to lock and unlock drivers door. But still needed to use fob to cancel the alarm on opening. I have f...

I assume by the comments that the latest Denso DVD Disks will not work in the Alpine unit then! ...

Is it possible to upgrade the Alpine unit to the latest version? And is it only necessary to upgrade the gubbins in the boot or would the screen and controls also need upgrading?