1. Remove the rear license plate.
2. Locate the trunk release mechanism. It is usually a small black plastic lever located on the driver's side of the trunk.
3. Insert a screwdriver or other tool into the trunk release mechanism and pry it open.
4. The trunk should now be open.
If you are unable to open the trunk using this method, you may need to contact a locksmith or a Jaguar dealership for assistance.