How to remove broken gas cap cover lid

it usually put in on the low pressure side of any air conditioning system, it will be on the largest size alumunin line that comes from the compressor, some have a blue cap covering the service port.

sounds like the gas cap is worn out and just needs to be replaced. you may be able to buy a universal at your local auto parts store.

yes you can still change oil with oil drained remove dip tube extract dip stick replace tube Then repair/replace dip stick, fill as per normal

Full instructions are too detailed for this forum I will try and post it on http://www.bluejag.co.uk in the near future for you.

but briefly
you first need to remove the Fuel tank
then the pump


Disconnect Battery
Drain fuel tank if possible.
Remove filler cap
Remove rear seat cushion
Detach Wiring harness
Remove rear subframe
Detach Filler
Disconnect filter
Disconnect purge pipe
Disconnect evap emisions hose
Remove fuel tank support strap retaining bolts
Remove tank

then
Disconnect electrical connector
Remove Locking ring using Jaguar tool 310-072A
Remove transfer pump

Its located at the front center of the engine (it have Jaguar logo), you need to remove 3 screws of the large panel and the oil cap, remove this large panel and then remove other 6 screws of the air filter box.

Check the ajar switch is working ok. This is by the latch on the boot lid to the left under a rubber cone cover. Whilst the boot lid is open push the switch fully in and see if the light is still on then you have a switch fault

think a lever by driver side seat for fuel door

There are 2 or 3 screws under the panel and other one behind the handle (not the one to open the door, the one you grab to close the door) this one is covered by a round plastic tap, remove it first with a small sharp pointed tool, then very carefully try to pull out the entire panel, be very careful not to broke the clips, you also need to "unplug" the wire that opens and close the locks.

There should be an emergency bypass cable in the trunk to open the gas door.

my Jaguar X Type gas cap "sticks". I can open it by wedging a corner of a credit card in the left side or the cover, then go in the car and pull the lever. There are two flimsy metal bands that hold the cover in place and they sometimes bend and then the release doesn't work.  it should open easily with the credit card wedged in; then bend back the metal bands into shape.