What's this then?

[MMT]

996 C4 - this pull ring is above the drivers side door hinge. It's definitely attached to a cable that disappears behind the front wing somewhere. My car has a pull lever bonnet release.

[Trev450]

Emergency fuel cap release if it's the same as a Cayman.

[YOUNGGEOFFREY]

Opens fuel filler flap

[MMT]

Course it is. Thanks guys. 👍🏼

[r1flyguy1]

It's the IMS grenade pin! Pull it and the IMS fuse activates and your engine self destructs