I have an 87 TDT and all the sudden when I reset the tripometer it stopped working along with the odometer. The speedo works fine. I am not sure how one can work without the other. Does anyone know what is gone wrong in there and can it be repaired?

Did you reset it while the car was rolling?

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

No I did not, Least I don't think I did. I suppose that will screw it up will it?

The odometer mechanism has a high percentage of plastic parts that can and do break at inconvenient times. Additionally, the plastic gears run on steel shafts and sometimes the press-fit fails. Some folks have reported good results by re-knurling the shaft or using glue to attach the gear to the shaft.

My '87 odometer started to slip and would work sometimes and not other times. I finally took the entire speedo assembly out of the cluster and sent it in for repair, cost about $160. I used Palo Alto Speedometer here on NorCal but there are good places elsewhere, I'm sure.

Another option would be your local junkyard but you would have to find a model of M-B that had the same speedo and then you'd have to set the miles to what your car has or live with the difference.

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

Here's a link to 123 odometer repair. I would guess that 124 odometers are similar.

http://dieselgiant.com/repairyourodometer.htm

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

Rick at www.speedometer.com just did Coda's odometer; replaced 3 gears.

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daw_two
Germantown, TN

Links:
Sold last car --- 05/2012 1984 300D Light Ivory, Red interior
Cluster Needles Paint
New Old Stock (NOS) parts

Past:
3/2008 1986 300SDL "Coda"
04/2010 1965 190D(c) "Ben"
& many more

exactly what happened to my odo. I think I reset mine while the car was rolling, don't remember exactly. Local mech. sent it off two weeks ago to be rebuilt. Don't know the cost yet, but if it takes much longer I'll press for a freeby.