Dave:

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

sliding window jaw
My first paying car repair job.
W140 Rear Left Window problem
Replacing Window "Sliding Jaw"????

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