I've been hassled with dashboard noise since within a month of taken delivery of my new mini in Jan 09.
Initial the rattle was coming from the left centre, this resulted in having the dashboard top replaced. This resolved the problem for a while.
The problem returned, this resulted in it going back in and having the dashboard top refitted.
The next problem was a very annoying vibration coming from the depths of the dashboard. The vibration seemed to happen between 1,500 and 2,500 revs, but particularly at 1,800 revs. After BMW doing an investigation it apparently turned out to be the heater matrix. Its now only just been replaced, which did require a complete dashboard removal. It seems to be ok, but I hope it doesn't cause more problems in the future.
I am disappointed that my mini has had these problems, it has spoilt the enjoyment of having my first new car. I also have a 13 year old Audi Cabriolet, and it’s quiet as a mouse.