rattle or squeak

Hi all, I have a seat leon mk2 and it's developed a plastic rattle and it sounds like it's coming from the passenger footwell. It doesn't sound like the glove box. Sounds like its coming from the top left in the passenger footwell. The rattle is only apparent over 50mph and sounds like a...

I have the dreaded rattle in my car again; took it to dealers last week and they "adjusted the rear seats". Didnt tell me what exactly they did. The problem seemed to be much better. Then I reinstalled my rear strut brace and it has come back. (I kinda thought this was the problem so had to...