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Odometer repair

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79Mercy's picture
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My odometer has decided it is going to work when it wants to. Sometimes I can reset the trip and it will count for a while then stop...

I guess the pot metal gear is slipping on the main shaft, or could it be something with the trip meter?

Is the repair similar to the 6 digit odo like in the W123's. I haven't ever messed with a 5 digit odo. Thanks

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1979 280CE 219,200 miles

1976 300D 193,500 miles

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Re: Odometer repair

79Mercy;198435 wrote:
My odometer has decided it is going to work when it wants to. Sometimes I can reset the trip and it will count for a while then stop...

I guess the pot metal gear is slipping on the main shaft, or could it be something with the trip meter?

Is the repair similar to the 6 digit odo like in the W123's. I haven't ever messed with a 5 digit odo. Thanks

After reading this article:http://articles.mbz.org/instrument/odo/, it appears that the repair should be similar.

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Re: Odometer repair

Thank you. I'll pull the speedo out and have a go at it. Thanks again

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1979 280CE 219,200 miles

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Re: Odometer repair

I am having the same problem. Unfortunately the link above does not work for me. Is there another one??

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Re: Odometer repair

If anyone has a working link for the article on odometer repair I'd appreciate it as well--many thanks

Tim Kraakevik

Four M110's

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Re: Odometer repair
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Re: Odometer repair

All these German odometer's are basically the same bit, Mercedes, Porsche, VW, Volvo(swede but still), the hardest part is not breaking something worse, or taking the needle off if you must. I personally try and ID which gear is slipping by carefully moving the speedo cable either by hand or with a variable speed drill and a shaft to take the place of the speedo cable, or I have even filed down a nail to match the shape of the speedo cable's end and chucked it up in a drill and run the speedo that way. Anyway, watch where it's slipping, clean it with alcohol or such and try and affix it to the shaft again with GOOD glue, preferably something gel-like. There are more in depth alternatives but this is the least invasive. On a w114 it's trivial to get the cluster out and apart, so it's worth a try.

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Re: Odometer repair

I've had that problem with my 280C, as have a couple friends with their old Benz's. It's funny, because I've never had the problem with my '67 250S. Don't know why some have it and some don't. Anyway, it probably works better when it's cold outside, as opposed to when it's hot. Is that correct? Your diagnosis is correct....drive gear slipping on shaft. We've done two types of fixes. One guy took it all apart and ended up drilling and pinning the gear to the sfaft. A lot of delicate work, but it worked. I just put a drop of Loctite on it and let it sit overnight. So far it's still working too, and it was way easier. You may want to give it a try. Hope this helps.

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