So after doing the fuel pump on my 03 S-type I figured I'd tackle a leaky seal on the '05. Come to learn, it has a different type of fuel pump retaining system that I can't find anything about. Specifically, it seems to be held on by this blasted "Fixing Clamp"

I cannot find a screw head to fit, it just feels smooth. Note after looking at this photo again, it seems the head on my clamp may be sheered off.




Aside from trying to smash a socket over it or something, any tips on getting this off? It's a really tight squeeze. Someone must have reefed on it prior trying to fix the leak.

 

Here you go, lots of details in this thread:

https://www.jaguarforums.com/forum/s...l-band-221643/