Car is back - rattle/creaking sounds are gone (so far). I did not realise how much of them noises I was putting up with and I don't know how I managed to live with them for so long!
The car literally cruises down the roads, as intended, taking each bump in it's stride without the need to creak and squeak back at me. It has totally changed the fun factor/ the experience and the enjoyment - call it going overboard, but eliminating these rattles etc has made a big impact on my GT ownership.
They investigated every part in the bootlid and adjoining headlining areas.
They found that there was no issue with welds/bolting panels together. The cause of it, so they believe, was in fact the flexing of the car over bumps/dips etc causing the interior panels in the bootlid to creak, rattle and generally annoy the hell out of me.
So, I suppose that my issue is/was slightly different to the sources of some other owners rattles...
No need to mask the noises now, so normal volumes on the BOSE have now resumed and my ears can get back to some normality
Anyone else any updates on their rattle issues?