Mine is a little different, the quarter trim panels are the same but the rear trim panel is slotted onto brackets at the top and bottom attached to a metal plate shielding the fuel tank. Once the trim is removed, at the top of the metal plate there are 4 slotted screws and one bolt (which has a thick spacer behind) to be removed and 2 screws with upholstery washers which go through the carpet at the bottom. When this plate is removed the fuel tank is exposed as well as the solenoid release for cover unlocking. Whilst the tank was exposed I found that the flange bolts for tank sender etc. required nipping up too, hopefully this will cure the slight whiff of fuel I have been smelling.