I just replaced my monovalve. Wound up getting a replacement part at at scrap yard for $15.00. Finally normal heat. When I was replacing it I dropped one of the screws. Wound up taking out the battery and battery plate to get the screw. Reassembled everything but now the clock only works when the car is running. Anyone have any thoughts.

The Dude.

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The Dude

1987 560 SEL

I think the clock has motor in it that winds up a clock spring to keep the clock on time when the ignition is off. This is a far out guess.

Can't imagine how these would be connected.

Clock has power regardless of key position.

Fuse or faulty ground, perhaps?

Jim

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14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles

I agree that it's powered all of the time, but a possiblity is that the car's voltage is a little higher (14.2 volts, approx) vs when it is off (12.6?) volts, and if your clock was marginal due to bad capacitors or possibly dirt, it might work at 14 volts but not at 12.

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86 560SL
With homebrew first gear start!
85 380SL
Daily Driver Project

http://juliepalooza.8m.com/sl/mercedes.htm

I bet on a fuse issue or failing clock.

It is electric and has no springs.

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

I had an intermitten issue on a 420SEL I owned a few years ago relating to the clock. There was a short circuit somewhere in the car and the batt would die after sitting over 2 days with no usage. Well everytime I would jump start the car, the clock sometimes would work, would not work at all, work when the car is off or when the car is on... Wierd but when I had the short circuit sorted out, the clock started to work normally again

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2001 E55

2001 E320 Sedan

2001 Subaru Legacy

2006 SLK280

2016 Subaru Outback 3.6

Check the voltage at your battery with the car off. Should be at least 12.5 Volts. Turn on your car and check voltage at battery with car running. Should be around 13.8 volts. If it is less than 12 volts with the car off, your battery is getting weak.

Your clock is getting old, and the push button that is used to change the time is sticking. When you disconnected the battery, your clock stopped. When you reconnected it you had to change to the present time which meant you pushed in the knob and turned it to the correct time. When you released the knob, it did not come out all of the way. Push the button in,and then change the time and then pull the button out all of the way. I sometimes have to do this 5 or 6 times on both my 85 and 86 S class cars. It always happens to me in the spring when we spring forward and in the fall when we fall back and I have to change my clock time.
Just fool around with the knob a little and it should start to work correctly.

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John
1986 300sdl
1985 380se

The 126 clocks do develop bad capacitors and eventually short out . i believe many of us have replaced the two clock capacitors and its humming again.