PeachParts Mercedes-Benz Forum - Odometers Not Agreeing

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Quote:

Originally Posted by Diseasel300 (Post 3781952)

No. Once you pull the speedo out of the cluster, the plastic bearing housing is right on the side opposite the gear train. If you're taking the time to go that far in, make sure your gears are good. So far the O-ring is holding up, still keeping accurate mileage.

I put in brand new gears from Garagistic a few months ago so I'm good. I was playing around with a non functioning gasser speedometer I had lying around and there was a capacitor or something partially blocking the housing. I wasn't sure if the 300SD had the same issue. I'll try to find an o-ring in the size you spec'd. The closest thing I've found readily available is 1.9mm x 5.8mm.

Not sure about the 300SD. On the 300SDL, you can get the cover off without taking anything else off. There's a couple screws that hold it on. I also don't think the size is that big of a deal on the O-ring either, so long as it fits over the end of the magnet assembly and rubs on the plastic cover to add a bit of friction. The size I spec'd is what I had on hand at the time that fit and did the job!