Jaguar Repair Problems? Ask a Jaguar Repairs Expert.
You just need to depress the two side of the bulb holder then pull it out of the lens. When installing the new bulb do not touch the glass part. Place the bulb in the connector and snap it into the lens .
Your question states a 2002 XJ but is it a 2004?
Sorry for the delay as I had a family emergency. There should not be a cover on the back of the headlamp but there was a plastic trim which was just held in by small plastic screws. If you can send me a photo of what you are referring to it should help.