Mercedes-Benz GLB-Class Transmission Fluid Capacity

The Mercedes-Benz GLB-Class stands as a testament to the brand’s commitment to innovation, luxury, and performance. Positioned uniquely within the Mercedes lineup, the GLB-Class bridges the gap between the compact GLA and the more spacious GLC, offering a perfect blend of versatility and elegance.

Key Takeaways:

GearboxFluid capacityFluid type
6-speed manual 711.61.9 quarts (1.8 liters)MB235.10
7-speed DCT (700.42, 7DCT300)4.2 quarts (4 liters)MB239.21
8-speed DCT 724.15.8 quarts (5.5 liters)MB236.22
  1. Vehicle Maintenance: Proper maintenance, especially concerning transmission fluid, is crucial for the longevity and optimal performance of the Mercedes-Benz GLB-Class.
  2. Transmission Fluid Basics: Transmission fluid plays a pivotal role in lubricating, cooling, and ensuring the smooth operation of the transmission system.
  3. GLB-Class Specifications: The GLB-Class has specific transmission fluid types, capacities, and change intervals based on its generation and model year.
  4. Recognizing Issues: Early detection of transmission problems, such as slipping gears or unusual noises, can prevent more severe issues and costly repairs.
Mercedes-Benz GLB-class AMG

With its distinctive design, the GLB-Class boasts a robust exterior that hints at its off-road capabilities, while its interior exudes the luxury and sophistication that Mercedes-Benz is renowned for.

One of its standout features is the optional third-row seating, a rarity in the compact SUV segment, making it an ideal choice for families and those seeking both space and style.

Transmission fluid plays an indispensable role in the overall health and performance of a vehicle. This vital fluid serves as both a lubricant and a coolant for the transmission system, ensuring that the gears shift smoothly and without friction. Over time, as the vehicle is subjected to various driving conditions, the transmission fluid can degrade and lose its effectiveness.

Maintaining your vehicle’s transmission fluid on a regular basis is vital, particularly for older or contaminated fluids. Neglecting to maintain your transmission fluid can cause increased wear and tear on the transmission components, resulting in costly repairs or even complete transmission failure. Since the Mercedes-Benz GLB-Class is an elegant vehicle, it is essential to make sure that the transmission fluid is of the correct type and changed at the recommended intervals.

This not only ensures optimal performance but also extends the lifespan of the vehicle, ensuring that the GLB-Class runs smoothly for many years to come. Moreover, timely maintenance can also help in identifying potential issues before they escalate into major problems, making it easier and less expensive to resolve them.

Mercedes-Benz GLB Transmission Fluid Capacity And Type

TransmissionFluid capacityFluid type
GLB250 8-speed DCT 724.1Drain and refill: 5.8 quarts (5.5 liters)MB 236.22
GLB35 AMG 8-speed DCT 724.1Drain and refill: 5.8 quarts (5.5 liters)MB 236.22
  • Transmission Fluid Type:
    • For the 6-speed manual transmission (711.6): MB235.10
    • For the 7-speed DCT transmission (700.42, 7DCT300): MB239.21
    • For the 8-speed DCT transmission (724.1): MB236.22
  • Fluid Capacity:
    • 6-speed manual transmission (711.6): 1.8L
    • 7-speed DCT transmission (700.42, 7DCT300): 4.0L
    • 8-speed DCT transmission (724.1): 5.5L. Total capacity is about 8L.
  • Recommended Change Intervals:
    • It’s advisable to refer to the vehicle’s manual or consult an authorized Mercedes-Benz service center for the recommended change intervals. However, as a general guideline, many experts recommend changing transmission fluid every 60,000 miles.
2020 Mercedes-Benz GLB-Class

Transmission Fluid Basics

Transmission fluid is more than just a lubricant; it’s the lifeblood of the transmission system. Its primary functions include:

  1. Lubrication: At its core, transmission fluid minimizes friction between the gears, bearings, and other internal components of the transmission. This lubrication prevents wear and tear, ensuring smooth gear shifts and prolonging the system’s lifespan.
  2. Cooling: The transmission system generates heat, especially during intense driving conditions. The fluid helps dissipate this heat, preventing the system from overheating and ensuring it operates within the optimal temperature range.
  3. Transmission of Power: The fluid aids in the hydraulic function of the transmission, facilitating the transfer of power from the engine to the wheels. This ensures efficient acceleration and vehicle movement.
  4. Protection: Modern transmission fluids often contain additives that help protect metal surfaces from wear, resist oxidation, and prevent the buildup of harmful deposits. This ensures the transmission system remains clean and functions efficiently.

Overview of the Various Types of Transmission Fluids and Their Characteristics

There are several types of transmission fluids, each formulated to meet the specific needs of different transmission systems:

  1. Dexron/Mercon: These are the most common types of transmission fluids used in automatic transmissions. They have specific formulations and standards set by manufacturers. Over the years, both Dexron and Mercon have seen multiple versions with improved formulations.
  2. Type F: Initially designed for Ford vehicles, this fluid has a different frictional property compared to Dexron and Mercon and is less commonly used today.
  3. CVT Fluid: Specifically designed for continuously variable transmissions (CVTs), this fluid has unique properties to cater to the unconventional operation of CVTs.
  4. Synthetic Fluid: Made from artificially created chemicals rather than refined petroleum, synthetic fluids offer better performance at extreme temperatures and longer fluid life. They are often recommended for luxury and high-performance vehicles.
  5. Manual Transmission Fluid: Also known as gear oil, this fluid is thicker than most other transmission fluids and is specifically designed for manual transmission systems.
  6. Dual Clutch Transmission Fluid: Designed for the unique needs of dual-clutch transmissions, this fluid ensures rapid gear shifts and protects against wear in these high-performance systems.

Recognizing Transmission Issues

The transmission system is a complex component of any vehicle, and when issues arise, they can manifest in various ways. Recognizing these symptoms early can prevent more severe problems down the road. Here are some common signs of transmission problems:

  1. Slipping Gears: If your vehicle unexpectedly changes gears or has difficulty staying in gear, this could be a sign of a transmission issue.
  2. Delayed or Rough Gear Shifting: Experiencing a noticeable delay when shifting out of park or feeling jolts and hard shifts can indicate a problem.
  3. Unusual Noises: Hearing grinding, whining, or clunking sounds, especially when the vehicle is in neutral, can be symptomatic of transmission troubles.
  4. Warning Lights: Modern vehicles come equipped with sensors that trigger warning lights on the dashboard when there’s a potential issue. If the transmission or check engine light illuminates, it’s essential to get it checked.
  5. Fluid Leaks: Transmission fluid is vital for the system’s operation. If you notice red or brownish puddles under your vehicle, it could be a sign of a transmission fluid leak.
  6. Burning Smell: Overheating transmission fluid can produce a burnt odor. This smell indicates that the fluid has broken down and may not be lubricating the transmission parts adequately.

The Correlation Between Transmission Issues and Fluid Maintenance

Transmission fluid plays a pivotal role in the health and functionality of the transmission system. Its primary job is to lubricate, cool, and facilitate the smooth operation of the transmission. Here’s how fluid maintenance correlates with potential transmission issues:

  1. Fluid Quality: Over time, transmission fluid can degrade and become contaminated with dirt, metal shavings, and other debris. Using old or dirty fluid can accelerate wear on the transmission’s internal components.
  2. Fluid Levels: Running a vehicle with low transmission fluid can lead to inadequate lubrication, causing increased friction and heat. This can result in premature wear and potential damage.
  3. Regular Changes: Just like engine oil, transmission fluid needs to be changed at regular intervals. Failing to do so can lead to the fluid losing its effectiveness, potentially causing the transmission to overheat or not function correctly.
  4. Using the Right Fluid: Each vehicle model may require a specific type of transmission fluid. Using the wrong fluid can lead to reduced performance, erratic shifting, and even damage.

Cost Implications

Changing the transmission fluid for a Mercedes-Benz GLB-Class typically falls within a certain price range, depending on various factors. On average, for a GLB-Class, the cost can range from $250 to $350 for a complete transmission fluid change. However, this is a general estimate, and prices can vary based on location, service center, and other factors.

Several factors can influence the cost of a transmission fluid change for the GLB-Class:

  1. Labor Rates: Different service centers and mechanics have varying labor rates. Dealerships might charge a premium, while local garages might offer competitive rates.
  2. Fluid Type: The type of transmission fluid used can influence the cost. Synthetic fluids, which offer better performance and longevity, tend to be more expensive than conventional ones.
  3. Additional Services: Some service centers might recommend additional services, such as a transmission flush or replacing the transmission filter, which can add to the overall cost.
  4. Geographical Location: Prices can vary based on the region or city. Urban areas with higher living costs might have higher service rates compared to rural areas.
  5. Vehicle Condition: If the transmission system has other issues or if there’s a need for additional parts replacement, the cost can increase.

Cost Comparison with Other Vehicles in the Same Class

When comparing the GLB-Class to other vehicles in the same luxury compact SUV class:

  1. BMW X1: A transmission fluid change for the BMW X1 can range from $200 to $400, depending on similar variables mentioned above.
  2. Audi Q3: For the Audi Q3, the cost can fall between $220 to $400 for a complete transmission fluid change.
  3. Lexus NX: The Lexus NX might see prices ranging from $190 to $360 for a transmission fluid service.

DIY: Checking and Changing Transmission Fluid

Before embarking on the DIY journey of checking and changing your GLB-Class’s transmission fluid, ensure you have the following tools and materials:

  1. Jack and Jack Stands: To safely elevate the vehicle and access the transmission pan.
  2. Socket Set: For removing the transmission pan bolts.
  3. Drain Pan: To collect the old transmission fluid.
  4. Funnel: For adding new transmission fluid.
  5. New Transmission Fluid: Ensure it’s the type specified for the GLB-Class.
  6. Transmission Pan Gasket: In case the existing one needs replacement.
  7. Rags or Shop Towels: For cleaning purposes.
  8. Gloves and Safety Glasses: For personal protection.

A Detailed, Step-by-Step Guide to Checking and Replacing the Fluid

  1. Vehicle Preparation: Start the vehicle and let it run for a few minutes to warm up the transmission fluid. This makes it easier to drain. Then, turn off the vehicle.
  2. Elevate the Vehicle: Using the jack, lift the front of the vehicle and secure it with jack stands. Ensure it’s stable before proceeding.
  3. Locate the Transmission Pan: Under the vehicle, find the transmission pan. It’s typically a large, flat pan located beneath the transmission.
  4. Check the Fluid: Most vehicles have a transmission dipstick. Pull it out, wipe it clean, reinsert it, then pull it out again to check the fluid level and color. Healthy fluid is typically a clear red. If it’s brownish or has a burnt smell, it needs changing.
  5. Drain the Fluid: Place the drain pan under the transmission pan. Loosen the bolts around the pan, allowing the fluid to start draining. Once drained, remove the pan entirely.
  6. Clean the Pan: Wipe down the inside of the pan, removing any residue or metal shavings. Check the gasket for wear and replace if necessary.
  7. Refill with New Fluid: Reattach the transmission pan, ensuring all bolts are tightened. Using the funnel, pour the new transmission fluid into the dipstick tube. Be sure not to overfill.
  8. Check the Level: Start the vehicle and let it run for a few minutes. Then, check the fluid level again using the dipstick. Add more if necessary.
  9. Lower the Vehicle: Carefully remove the jack stands and lower the vehicle using the jack.

Essential Safety Guidelines to Follow

  1. Work in a Well-Ventilated Area: Transmission fluid fumes can be harmful. Ensure you’re working in an open space or a well-ventilated garage.
  2. Use Protective Gear: Always wear gloves and safety glasses to protect against splashes.
  3. Never Work Under a Vehicle Supported Only by a Jack: Always use jack stands to ensure the vehicle is securely elevated.
  4. Dispose of Old Fluid Properly: Never pour old transmission fluid down drains or into the ground. Collect it and take it to a local recycling center or auto parts store for proper disposal.
  5. Stay Informed: Always refer to the vehicle’s manual for any specific guidelines or recommendations related to your GLB-Class.

Frequently Asked Questions

What is the recommended frequency for changing transmission fluid in the Mercedes-Benz GLB-Class?

For the Mercedes-Benz GLB-Class, it’s generally recommended to change the transmission fluid every 60,000 miles. However, this can vary based on driving conditions, habits, and the specific model variant. Always refer to the vehicle’s owner’s manual for the most accurate and up-to-date maintenance schedule. Regularly checking the fluid’s condition and level can also provide insights into when a change might be necessary.

Can I use alternative fluid types in my GLB-Class, and what are the implications?

While there are various transmission fluid brands and types available, it’s crucial to use the fluid specified for the GLB-Class. Using an alternative fluid type can lead to:

  1. Reduced Performance: The wrong fluid might not provide the necessary lubrication or cooling properties, leading to rough or delayed gear shifts.
  2. Potential Damage: Incompatible fluids can cause premature wear or even damage to the transmission components.
  3. Voided Warranty: Using non-specified fluids can void any existing warranties on the vehicle.

How can I identify signs of low or deteriorating transmission fluid in my GLB-Class?

Several signs can indicate low or deteriorating transmission fluid:

  1. Slipping Gears: If the vehicle unexpectedly changes gears or struggles to stay in gear, it might be due to low fluid levels.
  2. Delayed or Rough Gear Shifting: A noticeable delay when shifting or experiencing hard shifts can be a sign of deteriorating fluid.
  3. Unusual Noises: Grinding, whining, or clunking sounds, especially when in neutral, can indicate low or old fluid.
  4. Burning Smell: Overheating transmission fluid can produce a burnt odor, signaling that the fluid might be breaking down.
  5. Transmission Warning Lights: Modern vehicles have sensors that can detect low fluid levels or other transmission issues, triggering warning lights on the dashboard.


  1. Mercedes-Benz Official Website: The primary source for all specifications, recommendations, and guidelines related to Mercedes-Benz vehicles. Link
  2. Mercedes-Benz GLB-Class Owner’s Manual: The definitive guide for all GLB-Class owners, offering in-depth details on maintenance, specifications, and best practices. Link


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