I managed to bust off the little plastic emergency cable for the fuel filler door release that you access from the front of the passenger door.   
 
(Did I say it was little?  It's like no thicker than a human hair!  Come on Porsche! 

 )
Anyhow, the free version of the workshop manual I found on the net doesn't make any sense (as usual).  It talks about accessing it as part of removing the fender  

 .
I took off the wheelwell liner (see attached photo), and it looks impossible to get at from there.
Has anyone out there replaced this 10c part?
thx   Norm