It should fit. There is a removable black plastic piece that fits behind the "glass" in the bottom-middle of the W123 cluster that the display would probably fit in.

I should retro-fit the display into my SD

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

I just want to put the display from the 126 into my 123 cluster. Where is the sensor, and does anyone have a wiring diagram that shows the temp display and it's associated wiring that I would need?

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JimmyL - Sorry, I don't follow...what's a font? LOL...OK-enough of that!

Back to Benz business ----

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71Inka02

62 W121 190DB - Original CA/AZ Car - Excellent Example
99 E300 Turbo Diesel - 362,000...Awesome Daily Driver
01 E320 Wagon - 297,xxx (wife's work car)
01 E320 Wagon - 131,000
02 Land Rover Disco SE- 110,000
87 BMW 325is (E30) Full Restore - Son's
06 Mini Cooper 'S' - Son's
87 Toyota FJ60 Land Cruiser - Showroom Condition - 152,000

84 300D - 142,xxx :cool - "Sold"
83 300D-"Sold" - 211,456
85 300SD-"Sold" - 213,789

I'd like to add the temp gauge to my 83. The Sensor, according to the ebay listing, is behind the front license plate. So my question is, what is the best power line to splice into to give the gauge power?

I got mine on ebay too.

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91 350SD
14 F150 Eco
19 Fusion Hybrid
11 GT500

The "best" place is probably on the guage cluster itself. Second best would be going to the fuse box and use the instrument fuse. It's as simple as putting a terminal end on the wire and connecting on the back side. (Disconnect the battery first.)

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Sam

84 300SD 350K+ miles ( Blue Belle )

There is a chance that you could install a temp gauge display from a W124 or W126 into a W123 cluster. The W123 has a "hole" in the "right" place for the display; it was designed for the "PRNDL" display for a column automatic (I don't know if such a vehicle was ever made). In our cars is it empty.

As has been said previously, the W126 complete cluster would take a lot of work to adapt to a W123.

Jeremy

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

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

Every 10C = 18F
Every 5C = 9F

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)