I tried adjusting the striker plates, but... they were screwed in too tight and I have now rounded off the flaming screws ggrrr...
I rounded mine off too. To get them undone i hammered a splined bit into the hole. These bolts seem to be made of soft metal so take care doing the new ones up.
Thanks for that tip. I had been considering (not very seriously) adjusting the striker plates myself because I can see marks on the paintwork where the passenger door striker plate has slipped from its original position. This would have saved the trouble of visiting the dealer. However, I realise that Fiat would not have obtained any feedback regarding the fault had I done this job myself. I certainly won't attempt it now!
Both doors creak now and this was the most minor fault on my last GP. The passenger door closes to a position where it is no longer flush with the surrounding bodywork. How long have Fiat been making cars?