Mercedes-Benz maintenance schedule
The Mercedes maintenance schedule follows the ASSYST PLUS service display, which shows Service A or Service B when a visit is due. On current models, Service A comes first, at about 10,000 miles or 1 year, whichever comes first. After that, Service A and Service B take turns, so most cars see the shop about once a year or every 10,000 miles.
On this page (11 sections)
The short answer
| Visit | When (about) | Main jobs |
|---|---|---|
| Service A | First at 10,000 miles or 1 year; then every 20,000 miles or 2 years | Oil and filter, fluid checks, tire pressure, brake inspection |
| Service B | First at 20,000 miles on the odometer or 1 year after Service A; then every 20,000 miles or 2 years | Service A plus cabin filter and brake fluid exchange |
| Extra work | By its own time or miles | Air filter, spark plugs, transmission fluid, coolant, and more |
Intervals from Mercedes-Benz USA, checked November 2026. The display can call for service sooner. Your Maintenance Booklet and owner’s manual come first.
How ASSYST PLUS sets the date
ASSYST PLUS is the service reminder in the instrument cluster. It tracks the distance driven and the time since the last service, and shows messages such as “Service A due” or the days left until the next one. Mercedes says it may call for service earlier than the booklet, depending on how the car is used.
The letter tells you the type of visit: A is the minor service and B is the major one. It may be followed by a number or another letter, such as A3 or B1. That extra character points to more work due at the same visit. What each number means is explained on the Service A and Service B pages.
ASSYST PLUS does not watch the oil level. Check it yourself between visits, along with the coolant, brake fluid level, washer fluid, lights, and tire pressure. Mercedes asks for tire checks at least once a month.
Service A and Service B
| Job | Service A | Service B |
|---|---|---|
| Mercedes-Benz motor oil and oil filter | Yes | Yes |
| Fluid level checks and top-ups | Yes | Yes |
| Tire pressure check and correction | Yes | Yes |
| Brake inspection | Yes | Yes |
| Cabin dust or combination filter | No | Yes |
| Brake fluid exchange | No | Yes |
| Reset the maintenance counter | Yes | Yes |
From mbusa.com, checked November 12, 2026. The full list for your car can be longer.
Additional maintenance work
Some jobs come on their own clock, by time or miles, and are added to whichever visit is closest. Mercedes bills them separately. As an example, the 2016 GLC Maintenance Booklet lists:
| When | Job |
|---|---|
| Every 2 years | Replace brake fluid |
| At every Service B | Rotate tires, if all four are the same size |
| Every 50,000 miles or 5 years | Replace the engine air filter and spark plugs |
| Every 60,000 miles or 6 years | Change automatic transmission oil and filter |
| Every 120,000 miles or 12 years | Replace the fuel filter (gasoline) and the coolant |
One model and year only. Other Mercedes-Benz models, engines, and years have their own list in their Maintenance Booklet.
Cars with different tire sizes front and rear cannot be rotated. More on each job: brake fluid flush and tire rotation.
Hard driving and short trips
The intervals assume normal use. Mercedes says to service more often with regular city driving and many stops, mostly short trips, mountain roads or poor roads, and long idling. The cabin filters may need changing sooner in heavy dust or when you often run the air on recirculate. For the general idea, see normal vs severe maintenance.
Mercedes also warns against conventional oil in cars with ASSYST PLUS. Use an oil that meets the Mercedes-Benz approval named in your owner’s manual.
Electric Mercedes-Benz models
Electric models such as the EQ line have no oil to change. Mercedes-Benz USA sells a two-year service package for them that covers the dust filter, the activated charcoal filter, brake fluid, wiper blades, and a multi-point inspection. The car’s display and its Service Booklet still set the dates.
Prepaid Maintenance
Mercedes-Benz USA does not list free scheduled maintenance on its service page. Instead, it sells Prepaid Maintenance plans that cover parts and labor for scheduled services for up to 4 years. Prices depend on the car and the dealer, so ask for a written quote and compare it with paying for each visit.
Dealer or independent shop?
Mercedes strongly recommends an authorized Mercedes-Benz dealer and genuine parts. Its booklet also says emission control parts can be serviced by any repair shop or person using certified parts. Either way, follow the booklet’s intervals and keep the receipts: Mercedes says that a failure caused by skipped or late maintenance may not be covered by the New Vehicle Limited Warranty. Your rights under federal law are on maintenance and your warranty.
Keep a record
Dealers confirm each service in the Digital Service Booklet. Repairs are not recorded there, and an independent shop may not have access. Write down the date, odometer, the full code (for example B3), the work done, and the price in a car maintenance log. Then you can see when the brake fluid and spark plugs were last changed.
More makes: BMW, Lexus, Volkswagen, and Tesla. All makes: car maintenance by make.
FAQ
How often does a Mercedes-Benz need service?
About once a year or every 10,000 miles on current models. Service A comes first at about 10,000 miles or 1 year, Service B follows at about 20,000 miles on the odometer or 1 year after Service A, and then they take turns. The ASSYST PLUS display can ask sooner.
What is the difference between Mercedes Service A and Service B?
Both include the oil and filter change, fluid and tire pressure checks, and a brake inspection. Service B adds a new cabin filter and a brake fluid exchange, and it has a longer list of checks.
Does a new Mercedes-Benz come with free maintenance?
Mercedes-Benz USA’s service page lists no free scheduled maintenance. It sells Prepaid Maintenance plans for up to 4 years. Ask the dealer whether your purchase or lease included one.
Can I reset the Mercedes service reminder myself?
Mercedes says a qualified workshop resets ASSYST PLUS after the work. Reset it only when the service has really been done. If it was reset by mistake, a Mercedes-Benz dealer can correct it.
Milealot is an independent site, not affiliated with or endorsed by Mercedes-Benz USA, LLC or Mercedes-Benz Group AG. Mercedes-Benz, ASSYST PLUS, and 4MATIC 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 and B intervals and contents, electric vehicle service package, Prepaid Maintenance; checked November 12, 2026): mbusa.com
- Mercedes-Benz, 2016 GLC Maintenance Booklet (ASSYST PLUS, first Service A and B, additional maintenance work, tire rotation, severe conditions, approved oils; checked November 12, 2026): mbusa.com
- Mercedes-Benz, 2014 M-Class Operator’s Manual, “Service message” (A and B with a number or letter, oil level not shown, arduous conditions; checked November 12, 2026): mbusa.com
- Mercedes-Benz Canada, MY2026 EQ Service Booklet (additional maintenance work by time and distance, billed separately; Digital Service Booklet; checked November 12, 2026): mercedes-benz.ca