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  #16  
Old 05-22-2012, 12:47 AM
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More knowledge is just more insurance of a great repair.
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1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

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  #17  
Old 12-13-2015, 07:24 PM
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Switch cleaning worked for me

Just wanted to give a shoutout to this thread as it helped me diagnose and fix my dead turn signals. Hazards worked, signals didn't. So I pulled the console, disconnected the hazard, and tried the wire shorting trick. Signals worked. So I took the switch inside, gently took it apart and cleaned, and all is well.
I love car people.
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  #18  
Old 12-13-2015, 10:58 PM
cfh cfh is offline
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Location: DFW, Texas
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Might be a little off topic - maybe I should start a new thread - but I've been wondering whether it would be feasible to replace the older style console and its switches with a newer console (like in 83 -85 w123 or W126) - I have some of both styles (and some consoles with no switches); the older style switches (with the chromed plastic bezels) in my '80 model 300cd are not as robust nor as easy to maintain as the newer thinner switches (without the chrome) on the later model W123. I have picked up some of the female connectors for the newer style switches but haven't yet dug into the wiring differences - and I seeem to recall that there are some differences. Has anyone tried this upgrade?
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  #19  
Old 12-14-2015, 08:07 AM
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Location: Matthews, NC
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Bob, Great job. Thank you for sharing it with us. If you don't mind I would like to add 2 things that I learned over the years.
First, for cleaning electrical contacts I use a a pencil eraser followed by WD40 to clean out any rubber crumbs that may have come off. The eraser polishes the contacts but doesn't remove any of the contact itself. If the contacts are really pitted then use whatever is needed to clean them then polish with the eraser.
The other thing you didn't mention is that the center of the contact plates where they pivot is also an electrical contact. So each switch has 6 contact points, 3 or each side.
The first switch i cleaned still failed to work because of this center contact. It is not as obvious as the other 2 contacts.

Thanks again.

PaulM
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  #20  
Old 12-14-2015, 06:32 PM
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Good points Paul
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1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."
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  #21  
Old 06-23-2016, 12:34 PM
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Join Date: Feb 2016
Location: North New Jersey
Posts: 403
1982 300d -

If both of my rear door window switches aren't working - but both rear windows work fine when operated from the center console switches - can I assume(hope) that the little square button in the middle of the console switches needs a cleaning?

Is there a good pic showing how I should lift up the center wood panel to get at the switches? Do I need to remove the gear shifter or anything?
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Montclair, NJ
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1982 300D Turbo
120k
Petrol Blue Green
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  #22  
Old 06-23-2016, 12:54 PM
Shadetree
 
Join Date: Jan 2010
Location: Back in SC upstate
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I don't know about the 300D but the SD console wood trim slides forward to unlock then lifts for removal. The SD has a plastic tray just in front of the wood trim which has to be lifted from it's front to be removed. It locks the wood trim in place by preventing it from sliding forward.

It seems I remember the ash tray has to come out to access the front of the plastic tray.
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