She was starting just fine in the mornings, about 20 degrees with a block heater. Last night we got the first big snow, bad roads and all but didn't get as cold as it had. Went to start this morning, nothing, won't even try to start. So I tried jumping it, checked the starter for any slush that might have got caught there, and now have it charging. The dash lights/lights go on and look fine.

I have been reading that a cold snap can ruin an old battery, does it sound like a battery problem? I'm checking the wires and grounds now. Just wanted some ideas.

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1981 300D 205,000 mi.