yep...window regulator maybe the culprit.

DIY here if you dare.

http://www.bombaydigital.com/boxster/projects/window/

jorge

 

Sounds like a window regulator. I just recently replaced mine, Sunset Imports has the best price I could find. If you do it yourself, remember to remove the extra stop at the bottom or the window won't go all the way down - ask me how I know...