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2008 Mercedes-Benz C300 4MATIC Question: What does service code AO indicate?



as123890, Manteca, CA, February 18, 2011, 15:27

I get a service code of AO on my instrument cluster. I know A means the oil and filter are due for a change, but Mercedes would not tell me what the "O" service code means. Check brake pads and rotors, change brake fluid perhaps????

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  • Answer #1

    February 18, 2011, 23:15

    i service mercedes and never seen an o service. could it be a D service you seen?

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    Visitor, February 20, 2011, 12:49

    It may be. The A and O or D are right next to one another on the instrument panel. It states AO or AD Service due in 900 miles. What is a "D" service? Thank you for your reply and assistance.

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    Visitor, April 08, 2011, 09:54

    it states A O

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