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#1
11-03-2008, 12:13 AM
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300 TD Speedo/Odo repair
My workshop manual doesn't show much on how to repair the speedometer and/or odometer. The odometer stopped about three weeks before the speedometer went out . I have taken out the instrument cluster before and know where the speedometer cable connects, but I don't know how to examine the whole system for troubleshooting. Where does it connect to the transmission? Where should I look first for possible problems? Is this an advanced job for a novice?
Thanks a lot! 
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#2
11-03-2008, 02:21 AM
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Testing with another instrument cluster would be ideal. I tried to fix everything myself, ruining my odometer in the process. Luckily, I had another matching non-functional one that I sent off to a professional. 2 weeks later I got it back.
__________________
1985 500SL Euro w/ AMG bits 130k  1984 300SD Turbodiesel 192k  1980 240D Stick China 188k  2001 CLK55 AMG 101k  2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!! 
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#3
11-05-2008, 10:38 PM
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the speedo is driven off the rear of the transmission housing. If you remove the cluster and have access to the speedo take a small drill bit that just fits snug in the end of the speedo where the cable connected and spin with drill. if speedo reads then you may have a broken cable. Not uncommon. Have seen several. The odo is the pot metal gear that drives the odo unit comes loose on the steel shaft. i have removed this gear, and "nicked" the shaft enough to cause it to grab the gear better. Most work good for several years.
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