Replaced the plugs in my 1995 C280, it ran a bit rough for the first min or so, but then the check engine light came on? The car runs smooth as silk now, but the light remains on. Is there a way to shut it off W/O going to the dealer??

I think the missfire was because of the new COPPER BOSH plugs I put in and did not check the gap is what set it off, I re-gapped then it ran great, but it remains on?

Any help would be great!!

ThX,
Bill