Just an update on my out of warranty repairs being covered by FCA. I have had success with getting some of my issues resolved. Some of the issues are intermittent and I have to go through the process of trying to produce or document the fault to the dealer to get further action. The things they did fix out of warranty were a new dash demister grill (rattle), new headlights (DRL milky discoloration), and a new ECM, fobs, etc. (Intermittent starting issue).
The intermittent problems I still have include this high pitched ringing sound.
Also clicking from the drivers seat over bumps, and a clunk from the rear. I think I've actually narrowed the clunk down to the spare wheel cover. Anyway I'm still pretty happy, particularly with the starting issue which was bloody annoying and would have been expensive to fix.