What are the best Mercedes-Benz repair shops?
RepairPal Certified shops can diagnose and repair your 1999 Mercedes-Benz S320. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
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Okay, here are the codes: 301,302, & 306. I have new spark plugs. Autozone guy told to reset them all, which I did, and wait for the light to come out again if something still needs to be fixed.