XK-8 Coupe (X100) V8-4.0L (AJ27) (1999)
Fuel Door Lock Switch: Description and Operation
Internal Trunk & Filler Flap Emergency Release
The fuel filler flap is released via a switch located on the driver's underscuttle. This switch will only operate if the engine is not running and the vehicle is
unlocked, or the ignition is in position I or II.