Mercedes Service A: what’s included
Mercedes Service A is the minor scheduled service. It includes a Mercedes-Benz oil and filter change, fluid level checks and top-ups, a tire pressure check, a brake inspection, and a reset of the service reminder. On current models, the first Service A is due at about 10,000 miles or 1 year, whichever comes first.
On this page (9 sections)
What Service A includes
| Job | What it means |
|---|---|
| Motor oil replacement | Drain and refill with Mercedes-Benz approved oil |
| Oil filter replacement | New oil filter |
| Fluid level checks | Check and correct fluids such as coolant, brake fluid level, and washer fluid |
| Tire inflation | Check and correct tire pressure |
| Brake inspection | Look at the brake pads and rotors |
| Reset maintenance counter | Start the ASSYST PLUS countdown again |
From mbusa.com, checked November 12, 2026. Your car’s Maintenance Booklet may list more checks.
The full checklist in a Maintenance Booklet is longer. In the 2016 GLC booklet, Service A also covers the warning lights, horn, wiper blades, windshield, the drive belt, the tires and their tread, the steering and axle joints, the shocks, and a look under the car for leaks. Finding a problem is part of the service; fixing it is a separate repair.
When Service A is due
On current models, Mercedes-Benz USA puts the first Service A at about 10,000 miles or 1 year. After that, Service A comes about every 20,000 miles or 2 years, taking turns with Service B. So the pattern is A, B, A, B, about once a year or every 10,000 miles.
The ASSYST PLUS display can call for Service A sooner if the car is driven hard, makes many short trips, or idles a lot. Follow the display, and check your Maintenance Booklet for your model and year. More on the whole schedule: Mercedes-Benz maintenance schedule.
A1 to A9: the number after the letter
A number after the A means more work is due at the same visit. Mercedes’s owner’s manual says the letter, “possibly in connection with a number or another letter,” shows the type of service, and points you to an authorized Mercedes-Benz center for details.
Mercedes does not publish one chart that turns the number into a job for every car. The shop reads the service data from your instrument cluster, and its system shows the list for your model, engine, and age. Lists online that say “A1 is brake fluid” or “A3 is the air filter” come from shops and forums, not from Mercedes, and they do not agree with each other.
| Code | What it means |
|---|---|
| A1 | Service A plus the additional work coded 1 for your car |
| A2 | Service A plus the additional work coded 2 for your car |
| A3 | Service A plus the additional work coded 3 for your car |
| A4 | Service A plus the additional work coded 4 for your car |
| A5 | Service A plus the additional work coded 5 for your car |
| A6 | Service A plus the additional work coded 6 for your car |
| A7 | Service A plus the additional work coded 7 for your car |
| A8 | Service A plus the additional work coded 8 for your car |
| A9 | Service A plus the additional work coded 9 for your car |
The job behind each number depends on the model, engine, and year. Ask the dealer for the list for your VIN before the visit.
A simple way to find out: call the service desk, give the full code from the display and your VIN, and ask what the number adds. They can read it from their system in a minute. Then the price of the extra work is clear before you arrive.
What the extra work can be
Additional work is anything due by its own time or miles, or for optional equipment. As an example, the 2016 GLC Maintenance Booklet lists:
- Brake fluid: every 2 years. See brake fluid flush.
- Engine air filter and spark plugs: every 50,000 miles or 5 years
- Automatic transmission oil and filter: every 60,000 miles or 6 years
- Fuel filter (gasoline engines) and coolant: every 120,000 miles or 12 years
- Panorama sunroof guide cleaning, where fitted: every 30,000 miles or 3 years
Your car’s list may be different. Mercedes bills additional work separately from the base service.
How much Service A costs
Mercedes-Benz USA does not publish a price for Service A, and dealers set their own. We found no national figure from a source we trust, so we do not quote one. Here is how to get a real number:
- Ask two or three shops for a written estimate for Service A on your model and year, with the full code from the display.
- Ask for the base service and each extra item on separate lines, with parts and labor.
- Check whether your purchase or lease included a Mercedes-Benz Prepaid Maintenance plan. If it did, the service may already be paid for.
The oil change is the core of Service A. For what drives oil change prices in general, see oil change cost. Mercedes cars need an oil that meets the Mercedes-Benz approval in the owner’s manual, and many engines take more oil than a small car, so expect a higher bill than a basic oil change.
Before you go: three questions
- What does the number add? Get the extra jobs in writing for your VIN.
- Which items are due, and which are suggested? Fuel system cleaning or an engine flush are not part of Service A.
- Which oil goes in? It should meet the Mercedes-Benz approval in your owner’s manual.
Mercedes says to keep receipts. If an independent shop does the work, make sure it follows the Maintenance Booklet; skipped work that leads to a failure may not be covered by the warranty. See maintenance and your warranty.
What to write down
- Date, odometer, and the full code (for example A3)
- Oil brand, grade, and amount; oil filter part number
- Each extra job done, such as brake fluid or spark plugs
- What the inspection found, and the total price
A car maintenance log keeps these in one place, so you know what the next code will likely add.
FAQ
What is Mercedes Service A?
The minor scheduled service on a Mercedes-Benz: oil and filter change, fluid checks and top-ups, a tire pressure check, a brake inspection, and a reset of the service reminder. On current models it is first due at about 10,000 miles or 1 year.
What does A1 mean on a Mercedes?
Service A plus additional work that your car’s system has coded as 1. Mercedes does not publish one chart for all cars, so the dealer looks up the job for your VIN. Ask before the visit.
How much does Mercedes Service A cost?
It depends on the dealer, your engine, and any extra work in the code. Mercedes publishes no price. Get a written, itemized estimate from two or three shops with the full code.
Does Mercedes Service A include an oil change?
Yes. Mercedes-Benz USA lists motor oil replacement and a new oil filter as part of Service A, along with fluid, tire, and brake checks.
Milealot is an independent site, not affiliated with or endorsed by Mercedes-Benz USA, LLC or Mercedes-Benz Group AG. Mercedes-Benz and ASSYST PLUS are trademarks of their owner and are used here only to name the vehicles and systems.
Sources
- Mercedes-Benz USA, Service and maintenance (Service A list and interval; no prices; checked November 12, 2026): mbusa.com
- Mercedes-Benz, 2014 M-Class Operator’s Manual, “Service message” (letter with a number or another letter shows the type of service; checked November 12, 2026): mbusa.com
- Mercedes-Benz, 2016 GLC Maintenance Booklet (Service A checklist, additional maintenance work and intervals, billed separately; checked November 12, 2026): mbusa.com
- Mercedes-Benz Canada, MY2026 EQ Service Booklet (additional maintenance work depends on time and distance; checked November 12, 2026): mercedes-benz.ca