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  #16  
Old 02-06-2015, 10:38 PM
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Originally Posted by tyl604 View Post
Does this also work for the 300SD 1981? Or is the SD different?
The SD has plastic gears that go bad (ebay has them), and is also an electronic speedometer.
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  #17  
Old 02-07-2015, 04:51 PM
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tyl604, in that case you can also try the junk yard for a spare speedo (parts).

Good luck.
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1979 300D 199 K miles
1995 C280 95 K miles
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1979 240D 140Kmiles (bought for parents) *SOLD.
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1989 300SE 148 K miles *SOLD
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  #18  
Old 02-07-2015, 05:31 PM
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1981 300D 92k miles (daily diver)
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  #19  
Old 02-08-2015, 11:34 AM
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Originally Posted by tyl604 View Post
Does this also work for the 300SD 1981? Or is the SD different?
As mentioned before the SD's speedo/odo are drive by electronics and have plastic gears for the odometer. I've done a fair amount of work on these and if you're interested would be happy to go through yours and fix it up.

Here are some photos from an 81 I worked on. He was having problems with his odometer not keeping proper mileage. Was an interesting repair. He was also interested in adapting a 160 MPH speedometer for use in his SD. I ran out of time on the project and didn't get a chance to fully figure out the needed changes.

W126 300SD (1981) Instrument Cluster Refresh RT - Album on Imgur
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82 300SD 145k
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  #20  
Old 02-08-2015, 04:57 PM
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Thx; still considering.
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