I've got it cracked! (not a joke btw...)
I've solved the rattles!!!!! wink
The trip reset button was rattling around inside its housing. To get to it, the dials have to be pulled apart....fun.
'lubed it up with some silicon grease, and now its fine!
Also discovered the curved hood was making some interesting noises, only when the dials are screwed in...lots of wd40 cured that one!
And, the top of the dash where it meets the A-pillar was making a constant 'clicky' noise, but only when it got hot - Tightened it up, with a smear of silicon grease between the two plastics.
This has been a good day! I have cured 3 rattles when I only thought I had 1!!!
At the weekend I will attempt to retrieve the broken plastic clip from the speaker grille stuck inside the nearside door, currently causing the last rattle in my car!!!
I'm happy now!
I'll save the unhealthy cracks first thing in the morning till next winter.....