I fixed my first GT boot rattle by oiling the things that push up the boot lid - gone. Last week another rattle reered itīs ugly head. All my first thoughts have been "boot", but today (after lurching around the back while wife driving) I found out that the sound comes from somewhere between the front seats, maybe bellow.
You hear the sound/rattle/squeek by driving slowly and suddenly give some gas (ie every time the car starts), and to some degree then driving on bad roads. Not hearable when drivning smoothly at 2-3000 revs on good asphalt. It is not a loud sound, and it reappears just the sec when the engine is turned off, when there is a little "shake" in the motor. Like something is loose.
What is this?! To me it sounds a little more malign than my previous boot problem. The car has 1 year and 15000 km.