Mercedes Service B9 [What it Means, Includes & Cost]

What is The Mercedes Service B9 Service?

Mercedes-Benz recommends Service B9 for some car models. It’s a part of their scheduled maintenance plan. Service B is a complete maintenance package to keep Mercedes vehicles in good shape.

Service B9 is the ninth round of scheduled maintenance. During this, various car parts are checked, specific parts get replaced, and essential maintenance is done.

This ensures the car stays reliable and performs well. The exact details of Service B9 can vary depending on the model and year of the Mercedes-Benz vehicle.

The Mercedes Service B9 happens every 20,000 miles or every two years. It’s a scheduled maintenance. But, it depends on factors like driving style, climate, and vehicle age.

Recommended: Mercedes Benz A5 service

Mercedes Service B9

What Does Mercedes Service B9 Include?

Here’s a list of what the Mercedes service b9 includes:

1. Transmission Oil Replacement

The transmission oil replacement is for your car’s gearbox. It keeps the gears lubricated and cool, preventing them from wearing down.

It helps keep the metal parts in your car from wearing out, making it easier to shift gears.

You should change the transmission fluid. How often depends on your type of transmission.

2. Transmission Filter Replacement

The transmission filter is important. It sits above the transmission pan. It helps the transmission work well and prevents damage.

Still, it is necessary to replace the transmission filter. Not changing the transmission filter can cause issues.

I recommend you contact a mechanic to replace the transmission filter. Because to replace this filter, you first need to remove the pan and drain the fluid.

3. Brake Fluid Replacement

Make sure to change your brake fluid during a thorough inspection. This helps ensure your brakes work all the time.

This procedure is necessary because brake fluid can become contaminated over time. This can reduce performance or even result in a complete failure of the braking system.

I recommend you change your brake fluid at the right time to keep your brakes functioning at their best.

4. Air Filter Replacement

This improves the airflow to the engine, which allows it to breathe better and perform. It also protects the engine from dust, dirt, or moisture that could harm it.

5. Wiper Blade Inspection/Replacement

Turning on your headlights when it’s raining or snowing makes it easier for other drivers to see you. This helps keep you safe on the road.

It also prevents scratches or damage to the windshield.

6. Tire Inflation Check and Correction

Making sure your tires have the right air pressure is important.

It makes driving better by improving how your vehicle handles, stays stable, and uses fuel. It also reduces tire wear and the risk of blowouts or flats.

7. Brake Component Inspection

This looks at how well your brake parts work. It checks your brake pads, rotors, calipers, hoses, and lines.

It finds any problems like wear, damage, or leaks that might make your brakes not work well or be unsafe.

Learn more: Mercedes B3 (What is it & what does it involve)

Why Is Service B9 Important?

Service B9 for your Mercedes is important because it involves critical maintenance tasks that help keep your vehicle running smoothly and safely.

It typically occurs around the 20,000-mile mark or every 6 years, depending on the model.

During this service, essential components such as the engine, transmission, brakes, and other critical systems are thoroughly inspected and maintained. 

This proactive approach can identify and address potential issues before they become major problems, potentially saving you from costly repairs down the road.

Regularly servicing your Mercedes with B9 ensures its longevity, reliability, and overall performance, allowing you to enjoy your vehicle to the fullest while maintaining its value.

Cost for Mercedes Service B9

The cost of Service B9 may change. Mercedes-Benz servicing costs vary depending on the model, dealership, and repairs.

Service B9 costs between $800 and $1600, or even more. Contact your nearby Mercedes-Benz dealer or service center for the most precise estimate.

They can provide you with a precise quote based on your vehicle’s needs and current pricing.

While the cost may be high upfront, it is best that you seek the help of a professional. Running a DIY may affect the warranty in the long run.

What Is the Recommended Interval for Service B9?

The recommended interval for Mercedes Service B9 typically falls around every 20,000 miles or every 2 years, whichever comes first.

However, it’s essential to consult your vehicle’s owner’s manual or contact a Mercedes-Benz dealership for the precise interval tailored to your specific Mercedes model, as it can vary slightly.


The Mercedes Service B9 is vital. It includes essential maintenance tasks that keep your vehicle running smoothly and safely.

Regular maintenance helps your Mercedes-Benz last longer and perform at its best.