This thread is a pictorial of my install of a w126 Outside Temperature Display Unit in my 1983 300D.
I got this nifty idea from fellow forum member Biodiesel300TD in this THREAD.

All my other vehicles have an outside temperature display and find it very useful information to have.





I found a donor unit from a 1983 380SE including the wire harness at my local wrecking yard. I also picked up a backup unit from a 1987 w126. If I am not mistaken, I believe you can get these units and wire harness from 1981-1991 w126s.


This is the salvaged w126 components that are needed for the install in my 300D. (The mounting hardware is not salvaged.)



The display unit I have is in Celsius. Here is a picture of one in Fahrenheit.


The Celsius unit takes getting use to. But I have these guidelines in my mind.

C = F
0 = 32
5 = 41
10 = 50
15 = 59
20 = 68
25 = 77
30 = 86
35 = 95

Or using a forumula. F = (C x 9 / 5) + 32

Or this formula F =((Cx2)-10%) + 32




The Temperature Display Box/Brain will be inserted in the lower slot of the instrument cluster. 2 ½ inch screws and 1 ½ inch spacers will be needed. Also the box does not fit level with the existing screw holes. I used washers to make an adjustment.



As you can see the Temperature Display does not sit flush with the back of the W123 cluster. So longer screws and a spacer is needed.



In this pic the top cluster is from a w126. Notice the Temperature Display Box is entirely enclosed by the cluster.

The center cluster is my W123 mock-up piece in which you can see the Temperature Display Box protruding out from the back. Also notice the circuit board is exposed. I later put a flat piece of plastic from a plastic yogurt container to shield the circuit board.

The last cluster is my original 300D cluster ready for the Temperature Display to be installed.



This is the Outside Temperature Display sensor or probe. I installed it behind the license plate similar to the stock location found in the W126.



Continued...

Attached Thumbnails

         

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1983 123.133 California
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