Found this thread in another forum which describes how to use the 210 part in a 124 rear window, will also work for a 201.

http://www.benzworld.org/forums/w210-e-class/1332991-kajtek1-window-regulator-question.html

Part number is 210 720 00 42.

__________________
Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC