Dave:

I found some decent threads, some with pictures, that seem to discuss what you are asking. Hope they help.

http://www.peachparts.com/shopforum/showthread.php?threadid=42803&highlight=window+plastic
http://www.peachparts.com/shopforum/showthread.php?threadid=41071&highlight=window+plastic
http://www.peachparts.com/shopforum/showthread.php?threadid=37431&highlight=window+plastic
http://www.peachparts.com/shopforum/showthread.php?threadid=8963&highlight=window+plastic+slide

http://www.mindspring.com/~houlihan/merc/regulator.htm

__________________
John

2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)

Click to see 87 300E