Close
QUESTIONS

RepairPal is your advocate for car care advice and guidance

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

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????
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
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.
Didn't find what you were looking for?