Well back in Oct 2000, I had the OEM replaced with an Interstate battery.
That battery died this evening and I replaced it pronto soon after with another Interstate battery from Wheel Works (then brought it down there to have the tires rotated !).

So, it lasted about 8 yrs 6 mo., alot better than the OEM !!

for the archives .

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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