Barry I made a typo error and corrected it above. Should have read 13.6-7 V reading. Yeah 12.6 would be way low. Two days ago it read 13.8 so it ought to be OK.
At 12:45 PM today the battery read about 12.47V after the freeway ride. Just now, 8:40PM, the battery read 12.08 both readings with the car off.

I'll see tomorrow if the car starts.

Cheers.

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
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1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD