3 questions. 1. Will the car unlock from the doors with the key? 2. Do you just mainly want to gain entry into the trunk? 3. Will the key rotate in the lock cylinder for the trunk?
If the lock cylinder is inoperable the only way in is to remove the back seat and try to operate the latch from the inside. That is the only way. On your Jaguar, I'm not sure if the fuel tank is located directly behind the rear seats or under the vehilcle. It is not an easy task, but that is the only way.
ASE Certified Master Technician
ASE Master Tech w/ 19 years in the field. Self employed for 9 years. Member of AUTOLAB radio show.