The search function was not operational so I could not search archives.

Is there a way to get a CEL diagnostic code by switching the ignition key on/off several times and reading the light blinks on the dash?

Does anybody have the code sequence for the O2 sensor etc??

Thanks

1989 300SE with check engine light on.

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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