How do you open gas cap on 1993 XJ6 Jaguar?

if you mean the door to get to the petrol refill there is a white switch in the boot that you pull or push that will open it manually. you mean the cap inside that door then its a pain because my handle came of in my hand and i had to get a tea cloth and turn it and pull hard because it was being pulled down by pressure its neither then ignore all of this.