FS: W123 120MPH Speedometer

Speedometer only

$45 Shipped to the greater 48

Paypal only Please ~ IM me for payment / Info

Is this just a plug-and-play swap with an 85mph one? If so I want it.

If you plug it in it will work fine - not sure if you will need a corresponding speedo gear - worst case scenario, you can just order that from the dealer for not a lot of money

IM me for my paypal address if you are interested - Thanks!

on a downhill, long grade, perhaps

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current fleet
Ford f350 dully 7.3L 1990 . ats turbo , zf5
Mazda 4x4 b2600 with 617 20-26 mpg
Past fleet
1983 240D w123 232k 25-30 MPG
1984 Ford f250,1979 ford 150 300-6 (sold@ 251K )
81 300D, 79 240D , 2x 76 300D ,74 240D , 2x 89 grand prix , 85 grand fury , and several other fords

Custom machine shop work ..

I was told that the speedos vary greatly over the years of w123 model line and correspond to the differential gearing and transmission number.

Never found any list of speedo part numbers

Model and year that it originally came out of is a key starting point

Does the odometer work on this unit? A huge selling point!

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1990 300D 2.5Turbo, two tank WVO, daily driver 300,911
1992 E300 gaser, 150k. Parts only, For Sale

[B]1984 300TD Euro 4speed Sold
1977 300D Elsbett SVO single tank Sold
1981 300TD "Silver bullet" 285k ran B100 Sold
1981-5 300D x 5 cars stripped and reused, parts for sale

Other toys:
1995 Dodge 2500 Cummins 12V P7100 Bosch mechanical pump with 2 tank veggieconversion kit, only 120k!
1959 Cadillac Dad's legacy, needs finishing

You can fix odometers: How to Repair Your Broken Odometer

I was rummaging through my garage this weekend and found a 100mph speedometer that I pulled (I think) from a 300D...maybe an early NA one? I can't remember if it had a tachometer. I was only aware of 85 and 120's for the diesels. The 85's are just silly, especially on 1980 MY 450SEL's and 6.9's...considering I was cruising at 115 for part of my drive home last night.

Even a late 200D with the 3.92 diff is rated to do 84mph and will exceed that sometimes...good to have an odometer that's a bit high than too low. Turbo 300(S)D's are rated for 103mph. AFAIK the 85mph speedos started in 1980 due to a US DOT regulation, and I'm not sure how long they continued.

Hmm, from a bit of Googling, it appears that this would be a pre-1979 model, because it has a metal wheel center, as opposed to the later black style:



As usual in Mercedes, I prefer the earlier style.

That's not always the case. 79 and earlier speedo only listed 115mph on the face for diesels with a 3.47 ratio diff. 120 mph mark was on 83-84 speedos on a 3.07 diff and '85 on a 2.88 diff.

This particular speedo came off an '83 from looking at the part number. Somebody popped off the black center cap and glued on the silver one.



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1983 123.133 California
- GreaseCar Veg System

This came out of a 1979 euro model 280 and shows no indication it was ever changed in the way you describe.

This speedo has not been glued-on, nor does it show any evidence of it being modified / tampered with and to assume that would be very forward of you, especially if you are not 100% about what you say.

Yes I'm being forward and Oh I am 100% sure the part number on the face, 123 542 18 57, is from a 1983 300d with a 3.07 ratio differential.

Do a search on that part number and see for yourself.



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1983 123.133 California
- GreaseCar Veg System

Now the speedometer could have been recalibrated for a 3.58 ratio differential during the 280's Federalzation or the diff ratio was change to 3.07 to make it correct for the Euro import Federalization. However I see a repair tag, which may suggest it could have been recalibrated to the gear ratio on the car.


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1983 123.133 California
- GreaseCar Veg System