This is starting to scare me:

I had the engine washed to try and locate an oil leak. Right afterwards the charge started staying on while driving but would turn off when RPM got up. It went back to normal after a couple of days. That was 10 days ago...

Today it rained a LOT and the charge and break pad wear indicator lights stayed on all day while driving. I checked the voltage while running and while stopped, only on the battery, and it always read 12.5, dipping about 1 volt when the glow plugs were turned on but never going up, whatever the RPM. The check I did at the cigarette lighter. Don't know if that's indicative but it's all I could do so late.

Any idea?

Nicolas, really anxious to hear from anyone...

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1982 300D - http://members.xoom.com/nicodore/