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Old 04-28-2000, 10:20 PM
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Join Date: Apr 2000
Location: eastern NC
Posts: 149
My tach works briefly and then just quits. Sometimes it works as soon as I start up but other times not at all. Never lasts very long. Any thoughts? Thanks.

1985 380 SE 194K
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Old 04-29-2000, 10:29 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
Most of the time on the gas cars, you will have to replace the tach to repair. Make sure that all of the connections are on good and tight.

Donnie Drummonds
1992 500E (very soon I hope
1981 280GE SWB
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Old 04-30-2000, 11:19 AM
Registered User
Join Date: Apr 2000
Location: eastern NC
Posts: 149
Thanks, Benzmac. I was afraid of that. I was nervous about pulling the instrument cluster. I have the service cd and have seen the part on removal but it doesn't look that easy to me. IS this a DIY?
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Old 04-30-2000, 12:37 PM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Pulling the cluster on a 126 chassis is one of the easier models.

If you decide to do this, you might take it a step further. We find that almost all tach failures are either bad solder connections or bad capacitors (available at radio shack). Just replace them all. If you are planning to chuck it you might as well give it a try.

Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician
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Old 04-30-2000, 05:45 PM
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Join Date: Apr 2000
Location: eastern NC
Posts: 149
Thanks Steve, maybe I will try it after all.
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