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Old 04-28-2014, 07:56 PM
funola's Avatar
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Join Date: May 2005
Location: NYC
Posts: 8,245
DIY glow plug quick disconnects- good riddance 8 mm nuts!

I did this on my 83 (sold) and just did it on my 85 300D and took some pics. It saves a lot of time if you ever have to R&R glow plugs. Takes seconds to get the wires off and back on. No worry of losing the 8 mm nuts since you won't need them anymore.

Take apart a female Mercedes connector and unsolder the wires from the contacts. You will need a soldering iron with a big tip. Mine is a big old one probably around 80 watts. Spread the contact a little with long nose pliers to fit over the glow plug electrode.


Cut the ring spade and spread it a little to insert in the contacts like this.


I have 5/16 o.d. nylon fuel lines which fits over the contact snugly without falling off to keep water and dirt out. Before putting the contact on the glow plug electrode, I smear it with grease to keep moisture out. I use extra long, long nose pliers to insert and remove the contacts. Takes seconds, sure beats fighting those 8 mm nuts, twisting off the glow plug electrodes and dropping the nuts.


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Old 04-28-2014, 09:16 PM
scottmcphee's Avatar
1987 w124 300D
 
Join Date: Mar 2008
Location: Edmonton, Canada
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Spark plug wire end might do the trick too, with a proper thick wire attached and not the high tension resistor wire.

Maybe off a small engine.
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  #3  
Old 04-29-2014, 12:46 AM
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Location: Oregon
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When I built my glow plug harness I used fork terminals instead of rings. I don't have to remove the 8mm nuts, just loosen them.
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Old 04-29-2014, 06:02 PM
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smart.
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Old 05-01-2014, 08:53 AM
speedy82's Avatar
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Join Date: Jun 2005
Location: Ottawa, Illinois
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My raw knuckles thank you for this post!

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