Mercedes A9 Service [What Is Included & Checklist, Cost]

My most common question from Mercedes owners is about A9 Service. What does it entail, what’s included, and what’s the cost? The following article will explain everything you need to know. Let’s begin.

Mercedes a9 Service [What Is Included & Checklist, Cost]

If you plan to do the service yourself, I’ve included a checklist at the end of the article for your reference.

What is a Mercedes a9 Service?

Mercedes-Benz vehicles must be serviced every 10 000-15,000 miles, or when you receive a service reminder on your dashboard, for A9 service.

What does the Mercedes A9 Service include?

Here are the features of the A9 service.

Changing the oil

When you take your Mercedes for an “A9 service,” your first step is to change the oil.

In order to keep your vehicle running smoothly and prevent premature wear, an oil change is an important part of the service.

It is important to replace the oil filter and dispose of the old oil every so often since oil gets dirty over time.

Changing the brake fluid

In addition to changing the brake fluid on your Mercedes-Benz, the A9 service will also include an inspection of the engine.

Your vehicle’s brakes are controlled by a hydraulic system that uses a specific type of fluid to function smoothly.

You should replace this liquid every so often to prevent contamination, which can cause your vehicle to have difficulty stopping when you need it most.

Replacement of transmission filters

In Mercedes transmissions, the transmission filter is a porous, small disc that is responsible for capturing any dirt or grit that may have entered the transmission system during a transmission change.

The filter can clog over time, preventing the fluid from flowing freely through the gears.

As a result, you might have to pay for costly and lengthy repairs in the future if this happens.

Replacing the oil filter

In the next step of the A9 service, the oil filter will be changed. Engine oil is filtered by a circular, small oil filter inside the engine.

In Mercedes engines, an oil filter plays a crucial role in preventing dirt from infiltrating the engine oil.

It is possible to damage an engine over time due to a clogged or dirty oil filter.

Your vehicle’s old oil filter is removed during an A9 service, and a new one is installed.

Changing the automatic transmission fluid

The next step of the A9 service is an automatic transmission fluid (ATF) change.

Mercedes-Benz automatic transmissions include fluid that lubricates and cools the moving parts.

Fluids like this ensure the transmission of your vehicle runs smoothly and lasts as long as possible.

Overheating or even transmission seizing can occur if left untreated.

Inspection of tires and tire pressure

Last but not least, we inspect tire pressure and tire condition as part of the A9 service.

In addition to checking the pressure levels and tread wear of all four tires, the technician will inspect the condition of all four tires.

What is the cost of Mercedes A9 service?

Considering how much this service typically costs, let’s take a look at its cost.

What is the cost of Mercedes A9 service

Mercedes Dealership

Mercedes A9 Service costs an average of £650 ($789), with prices ranging from £500-800 ($607-971), depending on your car’s model and year.

Although you may think the price is high, this is a necessary service that will prevent you from having to pay for expensive repairs in the future.

Independent auto repair shop

As with any independent repair shop, the dealership will charge more for a service.

Mercedes A9 Services cost on average £400 ($489), and range between £300-600 ($388-855).

How Often Should an A9 Service Be Performed?

Keeping your Mercedes-Benz in good condition takes a number of maintenance appointments, including the A9 service. As long as you’ve been following your recommended maintenance schedule, you’ll need this service after 170,000 miles or about one year after your last B8 service.

How Often Should an A9 Service Be Performed

With A9, you’re essentially performing a comprehensive tune-up, checking and replacing parts that have worn out after 100k miles. Your Mercedes must be well-maintained if you have reached this mileage mark! You’re certainly reaping the rewards of all your diligent maintenance.

You need not worry about tracking when your Mercedes’ A9 service is due – the vehicle will remind you automatically. In addition to monitoring your mileage, the onboard computer keeps track of your service history. Your car will alert you automatically when it’s time to schedule the A9 service once you have reached the specified mileage or one year since the last A8 service.

 Mercedes A9 Service Checklist

  • Changing the oil
  • Replacement of oil filters
  • Changes to ATF
  • Change of brake fluid
  • Replacement of transmission filters
  • Inspection of tires and tire pressure

Service interval for Mercedes A9

As a final consideration, let’s examine the frequency of Mercedes A9 service. According to the manufacturer, cars should be serviced every 10 000-15 000 miles, meaning every 12-20 months.

What Makes an A9 Service So Expensive?

In order to determine the price for Mercedes service, the following factors are taken into account:

  • In order to meet Mercedes’ strict specifications, top-quality parts, fluids, and filters are used. As a result, these premium-grade components come at a higher price, but they ensure optimal performance and longevity.
  • In order to service these complex, high-tech vehicles properly, Mercedes technicians must undergo extensive and ongoing training. The higher labor rates are justified by their specialized expertise.
  • Diagnostic scanners and tools required by Mercedes are substantially invested in by Mercedes dealers. It is very expensive to purchase this specialized technology equipment.
  • With Mercedes being a high-end luxury brand, maintenance can be expensive, as is the case with any other prestigious brand. Those living with a Mercedes expect the brand’s esteemed reputation to extend to their service experience. Moreover, they will have a cleaner dealership bathroom and better coffee in their waiting room.

The bottom line is that you are paying for high-quality parts, expertly-trained technicians, and top-of-the-line tools, as well as a superior service experience as a whole.

How Long Does an A9 Service Take?

An A9 typically requires 1-2 hours for service. You may have to wait longer in the shop if several factors are involved:

  • Shop/Location: In most cases, larger dealers and shops with more technicians and service bays are more efficient than smaller shops with fewer technicians. Dedicated technicians can also work more quickly if they focus only on routine maintenance.
  • Seasonality: It is extremely busy at repair shops in the spring and in the months right before winter. As a result, turnaround times may be affected.
  • Additional problems found: The A9 service may take longer if additional maintenance issues are found, provided they can be addressed in the same appointment. More repairs are likely to be required when a vehicle has high mileage.

Although the A9 itself may only take one or two hours, any or all of the factors above can extend the total visit to 3 hours or longer. Depending on how much time you have, you may want to call the shop first to find out how long the wait will be.

Is it possible to perform an A9 service on my own?

The service of one’s own Mercedes is possible if you have some experience with car repair and maintenance. Most owners, however, prefer to have professional A9 maintenance performed by a shop because of the intricate nature of the system.

In order to properly meet factory specifications, technical know-how and specialized tools are required. When DIY maintenance is incorrect, mechanical issues can occur, safety hazards can occur, and warranties can be void.

Is it possible to perform an A9 service on my own

Although the savings may not be as great as you might expect, knowledgeable home mechanics who will make the necessary repairs themselves may be able to save some money.

By acquiring the right tools, finding part deals, and making maximum use of large fluid containers, you can save more money over time servicing Mercedes yourself.

A dealership or reputable shop performing this intricate maintenance with factory-trained technicians is worth the extra money for most owners. The best way to service your Mercedes is to leave it to an experienced owner.

Resetting an A9 service notification on a Mercedes

Mercedes service notifications can be reset without going out of your way. The last step, which should be completed after maintenance is complete, is often forgotten by DIYers and shops alike.

The following video shows you how to turn off your Mercedes-Benz’s maintenance service reminder light. However, the general process remains the same regardless of the model or year.

Effects on the environment

Eco-friendly servicing at Mercedes

Find out what eco-friendly practices Mercedes is adopting in its servicing. In addition to using sustainable materials, the brand also uses energy-efficient processes.

Reduced environmental impact of A9 service

It is important to service vehicles regularly, including the A9 service, to reduce their environmental impact. It is more beneficial for the environment to drive a well-maintained car, which emits fewer pollutants and is more fuel-efficient.

The expert’s recommendations

A Mercedes mechanic’s perspective

Maintaining your Mercedes is made easier with the help of Mercedes mechanics. The recommendations they make can play a significant role in improving the effectiveness of the A9 service, from driving habits to specific maintenance routines.

A9 service tips for maximizing its benefits

Discover how you can maximize the benefits of the A9 service with the help of experts. The health of your vehicle can be prolonged through simple practices, such as avoiding aggressive driving.

Read: Mercedes A5 service
Read: Mercedes A7 service
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FAQs about Mercedes A9 Service

Is the A9 service necessary for all Mercedes models?

There may be differences in the specifications for various Mercedes models, so the A9 service is recommended for them all. You can find model-specific instructions in your owner’s manual.

How often should I schedule the A9 service?

Mercedes recommends servicing the A9 after 90,000 miles, which is usually the recommended mileage interval. For precise recommendations, please refer to your owner’s manual.

Can I perform the A9 service myself?

Mercedes owners can perform basic checks of the A9, but certified technicians at authorized service centers should perform in-depth diagnostics.

What sets the A9 service apart from other routine check-ups?

Designed to ensure long-term performance and safety, the A9 service goes beyond routine maintenance.

Are there any warranties or guarantees with the A9 service?

A9 parts and services are often covered by warranties at authorized service centers. Details can be obtained from the service center of your choice.


To summarize, Mercedes A9 service is more than an annual checkup; it’s an investment in your vehicle’s long-term performance and health. Mercedes owners who prioritize regular maintenance not only contribute to their beloved cars’ durability, but also ensure a smooth driving experience.

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