Hi guys - hope this helps. Sorry it's a link to another forum, it's too early in the morning to repeat uploading of all the images

http://www.benzworld.org/forums/forums/thread-view.asp?tid=1170222&posts=7

Thanks to G-Benz for his description, which I nicked from a post (from 2003). I simply inserted his text with my pics (from yesterday)

It's an easy fix - anyone can do it. All you need is a philips head / flat head screwdriver - that's it. Good luck! 71Rcode

Thanks to Phil for the necessary part.