Well my check engine light came on again. It came on about 8 months ago, and I had one of the O2 sensors replaced, the one about half way down the exhaust after the catalytic converter. The check engine light disappeared after I disconnected and reconnected the battery.


so it came on again yesterday. Is there a way to tell if it is the primary or secondary O2 sensor, or how to access the failure codes?

I know in some beamers, you can turn the key, tap the breaks, and depending on how many blinks the light blinks it identifies an error code.


do we have something similar on the 90's model mb's, or is it only acccessible thru a computer?


as always any help is gratefully appreciated.

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1977 280 E
1994 C280
1992 190E (sold)

"Jump in the hatch and turn on the key, pop in the clutch and let the wheels roll free"