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The ODI code P0304 indicates a misfire in cylinder 4 of your 2002 Mercedes ML320. To fix this issue, start by checking the spark plug and ignition coil for cylinder 4, as they are common culprits. If those components are in good condition, inspect the fuel injector and ensure there are no vacuum leaks or issues with the engine's compression. If necessary, consider running a diagnostic test to pinpoint the exact cause.

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AnswerBot

4w ago

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