Thread: W123 Mechanical Speedo to Electronic
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Old 06-30-2020, 01:04 PM
mwagon mwagon is offline
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Join Date: Sep 2004
Location: Seattle area
Posts: 193
Math, see attached photos. The Electronic PU Plug that you'll need to source from a 1980's Mercedes such as a W126 or R107 car that already has a Electronic Speedo. The PU Plug goes into the Socket @ the RR area of the 717.402 Trans. Wire as outlined in previous post

Quote:
Originally Posted by math View Post
I have the same transmission i think. it's from a G-Wagon. where the cable speedo signal is from the transfer case rather than the transmission/gearbox.

I put it in my w123, but i have no speedo output from the transmission, help me please :'( it's blanked off where the mechanical speedoo output should be :'(
Attached Thumbnails
W123 Mechanical Speedo to Electronic-717.402-electronic-speedometer-trans-attachment-1-.jpg   W123 Mechanical Speedo to Electronic-717.402-electronic-speedometer-trans-attachment-2-.jpg   W123 Mechanical Speedo to Electronic-717.402-electronic-speedometer-trans-attachment-3-.jpg  
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