I apologise if I'm teaching you to suck eggs, but have you tried looking behind the glovebox?
I had a metallic tapping noise coming from my glovebox area and I couldn't for the life of me locate it.
It wasn't until I went to check my fuse box and pulled out the glovebox that I found a can of Gillette Men's Anti-Perspirant Deodorant rolling around there!!! (Thanks previous owner).
Matt
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2007 / FIESTA ST / SILVER + BLUE STRIPES OTT
K&N 57i / CUSTOM REMAP / CUSTOM BRAKES / MANY MODS
I am a detailing god