I’m still struggling with my 1980 300D [na] transmission shifting and not ready to throw in the towel by declaring the tranny hopeless !
I first read on another thread [http://www.peachparts.com/shopforum/attachment.php?attachmentid=32510&d=1143915823 ]
I was given help with finding the proper vacuum diagram. Thanks guys!
See:
http://www.peachparts.com/shopforu...d.php?t=105297
and this link led me to a really good site with diagrams for these vintage vacuum controlled systems… see:
http://www.peterschmid.com/vacuum.htm

Now for the “Eureka” part of this post. Today I went to the local M-B dealer’s parts counter and the first parts man had no clue when I showed him three of the vacuum orifices together with the diagram clearly showing it. His computer listing system was just of no help. Then they brought out a guy from the back room [a mechanic I think] who had his own personal hand-written list. I canNOT guarantee the accuracy but here is the results below. I think this list starts with the largest and ends with the smallest:
Color: P/N:
Yellow……..……..1162760929
Red………………….1162761029
Blue…………………1162761129
White………………1162761229
Green………………1162761329
Brown……………..1162761429
[actually I see the brown as burned orange]
I’m getting a complete set and will use whichever I need or possibly combination I need to tune the system as per the excellent 2002 article by Steve Brotherton at:
http://www.continentalimports.com/ser_ic20242.html
I hope this information is helpful to at least one of you out there!
Regards,
Sam - Novato, CA