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Old 08-05-2016, 07:38 PM
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Join Date: Aug 2016
Posts: 13
W126 Clock Help Needed

After reading some prior posts about clock repair in the W126, I replaced the capacitors for the clock in my '86 560SEL. I tested before I installed on a 12 V battery and it ran fine for 15 minutes before I put back in cluster and installed. Now, the clock will only run for about 5 minutes and then stop. I have attached a 12 volt battery directly to the clock and still only running for about 5 and then stopping. This is the second clock I have installed and both have the same symptoms. I replaced the capacitors on both. Does this sound like a ground or power issue? Or possibly some bad capacitors? I bought the 2 pairs of capacitors from Radio Shack at different times, so would be odd for it to be capacitors. Is the power lead to clock suppose to be on constant power...12V? Any help would be appreciated.

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Old 08-06-2016, 12:08 AM
BenzEnthusiast's Avatar
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Join Date: Dec 2011
Location: Manteca, CA
Posts: 207
I actually had this same issue on my 300SDL and found that what was actually causing it was the adjuster mechanism wasn't springing back all of the way after adjusting it to the correct time.

I added a bit of grease to the adjuster and it has been fine ever since.
1992 300D 2.5 TURBO

1991 560SEL M119.960

1991 420SEL Parting out.

1986 500SEL ECE Going to be sold soon.

1986 300SDL TURBO Going to be resurrected... eventually.

1992 190E 2.3 Sold to my brother.

1985 190D 2.2 Sold to a close friend.
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Old 08-08-2016, 11:35 AM
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Join Date: Apr 2005
Location: Northern Louisiana
Posts: 450
Great Information! My clock has done this for years. I would reset it three or four times then it would operate normally.

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