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^Okay so two charging problems in one thread right? With this one (above) change your battery first. Its probably bad.
 

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The best $20 I've ever spent on my 1989 W124

I got my hands on a perfectly straight 1989 W124 at a local auction for $500 nearly 8 years ago.

There have been a few things here and there that I've had to repair, some brakes, new struts, a driveling carrier bearing.

There have always been a few odd electrical issues with the car, seat adjusters that intermittently didn't work, one window, the sunroof was hit-or-miss, etc.
Then about a year ago it started having a parasitic draw. We replaced the battery and nothing changed, had to constantly keep a charger on it.

About a month ago I was fiddling around on amazon and bought a fuse kit, some copper grease and a new primary ground cable. I replaced every fuse in the box for less than $7. This entire electrical system has come back alive!
Everything works now. I haven't had to have the charger on the car at all since the ground cable and fuse replacement.

Before you get too crazy replacing parts, you might spend a few minutes covering the basics for cheap. You never know what you'll fix!
 
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