seat belt extenders, overhead light, windows - Mercedes-Benz Forum
 
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post #1 of 5 (permalink) Old 03-14-2019, 10:20 AM Thread Starter
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seat belt extenders, overhead light, windows

It's been awhile since I have been here.

It seems like my seat belt extenders, overhead light, and using the key to bring the windows up is not working...............

All at the same time.

1994 e320 Cab.

Overhead light will actually work, but when you shut the door, it stays on. So I now keep it in the center position.

I am thinking that perhaps a relay controls all three..... it appears that the system is not "reading" that the door has been opened. I guess it could also be the door switch in the jamb.

Any thoughts?
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post #2 of 5 (permalink) Old 03-14-2019, 10:26 AM
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check door jamb switch. Might have disconnected.

Cheapest, easiest to remedy if that's the issue.
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post #3 of 5 (permalink) Old 03-14-2019, 12:10 PM
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that stuff is all tied into the CF module under the back seat. if your rear floor has gotten damp in rain storms, everything is probably wet under there. the seat belt extenders have their own module, but it too is tied into the CF module.... and the cabriolet has its OWN unique CF module which is unobtanium.

cabriolet CF module from my 1993 300CE...



innards of the CF module from a 94 E320 wagon, just to see what it looks like...


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post #4 of 5 (permalink) Old 03-16-2019, 02:45 PM
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Before indicting the CF module, I would check one of the ago old issues with the W124 - the fuses. In particular, check Fuses 1 and C as they are common to all three systems that you are experiencing trouble with. Check for corrosion on the fuse ends. If you have not already done so, you should change out all fuses to the copper based ones instead of the tin/lead version.
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post #5 of 5 (permalink) Old 04-09-2019, 09:06 AM Thread Starter
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Quote:
Originally Posted by Floobydust View Post
Before indicting the CF module, I would check one of the ago old issues with the W124 - the fuses. In particular, check Fuses 1 and C as they are common to all three systems that you are experiencing trouble with. Check for corrosion on the fuse ends. If you have not already done so, you should change out all fuses to the copper based ones instead of the tin/lead version.
As usual Flooby is right. It turns out fuse 9 was the culprit..... I have to get the copper based by Flosser.... another fuse went out last week..... it controlled the instrument panel....but also "locked out" the ability to start.

Go figure..

I don't think I am having any electrical problems... just old tin plastic fuses...
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