Replacing a swivel badge

[Italian Supermodel]

Hi, I've picked up a new boot badge for my 2003 Spider and was hoping to put it on over the weekend. I had a look today at the lock mechanism and it offers not many straightforward clues other than a difficult to access small circlip.
Any assistance would be greatly appreciated.
By the way I'm only replacing the badge.

[Craig_m67]

This is how you do it on a 156, I suspect it's similar.
Buy a replacement circlip before you lose the original now 

Here >> http://www.alfaowner.com/Forum/alfa-147-156-and-gt/171518-changing-rear-badge-on-my-156-a.html
Here  >> http://www.alfaowner.com/Forum/tuning-and-upgrades/148223-rear-badge-replacement-156-a-guide.html
And here >> http://forum.alfa156.net/forum/forum_posts.asp?TID=39830&KW=boot+badge

[poohbah]

If you are replacing the badge just because the emblem as faded, and not because the mechanism is busted, you can purchase a metal emblem with adhesive backing which sticks over the old faded one.

Not one for the purists, but looks ok as long as it is centred correctly.