Many cars today also feature systems which can unlock such things as the luggage compartment or fuel filler cap door. (en.wikipedia.org)
After a friend and I looked at it longer, he checked for piston blow by putting his hand over the engine where the oil filler cap goes after he took it off. (mechanics.stackexchange.com)
A single large fuel tank was fitted (although some cars had twin tanks in the wings) and quick release filler caps are situated on each side. (astonmartins.com)