Mercedes B9 Service: [Cost, Checklist, And What’s Included]

While driving, does your Mercedes display a “Service B9 Due” message? Can you tell me why this message is being displayed? Nothing to worry about!

Mercedes B9 Service [Cost, Checklist, And What’s Included]

The following article offers a detailed explanation of the Mercedes B9 service code, its maintenance cost, and how the indicator should be reset after service has been completed. Let’s get started right away!


What Is A Mercedes B9 Service?

The performance, durability, and lifespan of Mercedes vehicles is maintained through two types of maintenance (A and B). Among these B services is the Mercedes B9, which includes a comprehensive inspection of engine components, transmissions, and brakes.

What Is A Mercedes B9 Service

Designed to protect your car from potential health issues, the B9 service is part of the Mercedes service schedule. You get all crucial tasks combined into one package that could enhance your car’s performance. 


What items are included In the Mercedes B9 service?

This particular service involves several items, each with its own importance, that all play a role in making it a success. Nevertheless, here is a list of what is included in Mercedes-Benz service B9:

What items are included In the Mercedes B9 service
  • Oil and filter replacement
  • Brake fluid change
  • Spark plugs replacement
  • Air filter replacement
  • Wiper blade inspection/replacement
  • ATF (Automatic Transmission Fluid) replacement

Oil And Filter Replacement

First and foremost, replace the old engine oil with a new one. By doing so, the mechanic ensures the engine’s moving parts operate smoothly and efficiently without overheating by draining the old oil and replacing it with the new one. 

Genuine Mercedes oil lubricates your vehicle’s engine, so I recommend that you always use it. There is no comparison between it and other local oils in terms of durability and performance.

Brake Fluid Change

Normally, hydraulic brake systems use this type of fluid. When a driver presses the brake pedal, brake fluid converts force into pressure, which causes the vehicle to come to a complete halt. 

After a limited period of time, its quality and reliability deteriorate. In spite of this, the technicians will add fresh fluid to the vehicle’s master cylinder reservoir after removing the old fluid.

In addition, brake pads and rotors will be checked to see if they are in need of replacement.

Spark Plugs Replacement

An engine’s spark plug ignites the air/fuel mixture by producing electricity. Also, spark plugs ignite fuel inside the vehicle’s combustion chamber. 

There are extended-range spark plugs that can last up to 100,000 miles, but 30,000 miles is the ideal range.

In order to protect your car’s engine and increase its fuel efficiency, it is best to use genuine, high-quality spark plugs.

Air Filter Replacement

A good air filter is just as important as any other engine part. Dirt-free and clean air filters increase the efficiency of the engines by ensuring that no air can enter the combustion chamber.

In addition, most dealers recommend having your air filter replaced every 90 days or three months to keep your engine cooler and more efficient.

Wiper Blades Inspection/Replacement

There is no doubt that it is vital for people who are driving at night or in bad weather conditions like foggy, snowy, rainy, or dusty to inspect and clean their wiper blades.

Conversely, faulty wiper blades can scratch your Mercedes windshield. Over time, they wear and tear, so they must be inspected regularly. Changing wiper blades may also be necessary.

ATF Replacement

In B9 service, automatic transmission fluids (ATFs) play a major role in transferring heat, protecting the transmission, and lubricating the transmission.

You can extend the life cycle of your transmission by replacing ATF when needed.

Experts recommend changing ATF every 30,000 to 60,000 miles (for manual transmissions).


Mercedes B9 Service Checklist

No.Service Items
1Oil and filter replacement
2Brake fluid change
3Spark plug replacement
4Air filter replacement
5Wiper blade inspection/replacement
6ATF (Automatic Transmission Fluid) replacement

What Is Mercedes B9 Service Cost?

In general, B9 service costs range from $700 to $1500. You can ask your dealership for the exact price if the price mentioned is slightly low or high. 

What Is Mercedes B9 Service Cost

Some factors can influence the total cost, including:

  • Car model
  • Labor rate
  • Location

Car Model

Due to higher service charges for Mercedes-Benz models that are more recent than older models, your Mercedes-Benz model may affect your B9 service price.

Labor Rate

Labor rates can vary based on experience, certifications, and brand identity. Professionally trained and knowledgeable technicians charge a higher rate.

Location

Getting B9 service requires a good location as well. In the USA, Mercedes B9 service may cost $700 to $1500, while in the UK, the cost may be significantly higher or lower.


Why Is A Mercedes-Benz B9 Service So Expensive?

B9 service maintenance on Mercedes-Benz vehicles always costs an arm and a leg for most passengers. My objective here is to explain some factors that will reduce their complaints about the service’s price.

Why Is A Mercedes-Benz B9 Service So Expensive

Exclusive Image Of Mercedes

In terms of luxury, Mercedes ranks among the top automakers in the world. Mercedes’ exclusive image, therefore, makes owners willing to pay more.

Expensive Tools And Gadgets

The diagnostic tools, computers, and scanners that mechanics must purchase in order to inspect vehicles accurately and comprehensively are extremely expensive.

Highly Trained Technicians

For Mercedes vehicles to remain complex, technicians must undergo rigorous training, degrees, and certification programs, which explains the high labor rates.

Expensive Auto Parts

Your Mercedes-Benz’s outstanding performance is maintained at its peak with genuine parts used in Mercedes B9 maintenance. Comparatively, these parts are more expensive than aftermarket parts. 


Tips To Make Good Choice

Using real-world data, I’d like to share my insights and tips as a Mercedes mechanic to help you make a decision about your B9 maintenance.

  • If you are planning to go for maintenance, ask your chosen garage how much it is going to cost, and keep some extra cash on hand.
  • Be sure to read the reviews and ratings of the shop you are considering before you make an appointment. 
  • Your mechanic will be able to analyze your car’s condition better if he knows about your faults and driving experience. 
  • If you are interested in a service plan with coupons and discounts, ask the provider. 

How Long Does A B9 Service Take?

Depending on the season, appointment time, and number of customers in the shop waiting for service, the B9 service can usually take 2 to 4 hours or up to 5 hours.

In some cases, you may have to perform many maintenance tasks on your vehicle, which can take longer than usual. When the shop is busy, there are usually a lot of clients waiting to be serviced, so it is best to schedule an appointment before going. 


Service B9: DIY Vs Professional

In addition to detailed vehicle knowledge and proper preparation, the Mercedes B9 Service would also benefit from detailed vehicle knowledge. This can, however, lead to risks if you don’t have any technical expertise. 

Mechanics with specialist tools and expertise should perform maintenance tasks properly. It is therefore always recommended that B9 service be performed by an expert (including me) by most techs.


Can I Do A B9 Service Myself?

A B9 service can be done on your own if you have extensive technical knowledge, the necessary tools, and previous DIY experience. If you want to get it repaired, I always recommend going to an accredited Mercedes service center.


When To Change The Air Filter?

It is recommended that air filters be changed every 90 days or every three months by most air filter manufacturers. You may have a different experience depending on where you live and whether or not you live in a dusty or dry climate. A professional can also assist you.


When To Change Spark Plugs?

Different factors influence how often spark plugs should be replaced, such as driving habits and engine conditions. Spark plugs should be replaced every 30,000 miles by most drivers, but extended range plugs can last 100,000 miles or more.


When To Change Automatic Transmission Fluid?

  • For manuals, every 30,000 to 60,000 miles
  • For automatic, every 60,000 to 100,000 miles

It is recommended for manual transmissions to replace the transmission fluid every 30,000 to 60,000 miles. Automatic vehicles can extend their range to 60,000 to 100,000 miles, and if you change the fluid early, there won’t be any problems.  


How To Reset B9 Service Notification On A Mercedes?

After the B9 maintenance, it is not necessary to book an appointment to reset the warning message. It only takes a few minutes to do that by yourself. Watch this video to learn how to reset service notifications:


Conclusion

Having a well-maintained vehicle will always give you an advantage when reselling it. Additionally, regular servicing prevents minor problems from developing into bigger ones by making passengers aware of them before they develop into serious problems. 

For detailed maintenance of Mercedes-Benz models, we determined that the B9 service is essential. A few of the sub-items include oil and filter changes, spark plug changes, air filter replacements, and more!

The next time you see an alert on your Merc Dash such as “B9 Due, Mercedes B9 Service”, have it serviced or visit your nearest garage or repair shop right away. 

Don’t ignore dashboard warning lights or delay getting service without reason to compromise your comfortable ride!

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