1984 380sl...with a never ending 02 light on, my HC count was 121, with a mas allowed being 122, CO was .20 with a max of .77 being allowed, NO was 807 with a max of 1081 allowed, so my hydrocarbon count was at the top, while NO was also high, CO was well within the limits....what should i make of all this? what needs to be checked and replaced? thanks.
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