Mercedes A89 Option Code: Your Ultimate Guide
Mercedes A89 option code is a crucial detail for identifying transmission fluid type. Discover how to properly identify and service your Mercedes 722.9 transmission with expert advice from CARDIAGTECH.NET. We offer solutions to make sure you get the correct fluid, maintaining peak performance and preventing costly damage.
1. Understanding the Mercedes A89 Option Code
The Mercedes 722.9 “7G-Tronic” transmission is a robust and widely used unit. Regular maintenance is essential for its reliability, but it must be done correctly. Mercedes offered two 722.9 variants with different serviceable filters and fluid types. Identifying which one you have is critical before buying any parts. Adding to the complexity, the changeover between variants happened mid-year, making differentiation challenging. The updated “late” 722.9, also known as the “Plus” model, features the A89 option code. This signifies several improvements and redesigns.
1.1. Key Differences Between Early and Late 722.9 Transmissions
| Feature | Early 722.9 (NAT2) | Late 722.9 Plus (NAT2FE+) |
|---|---|---|
| Advertisement Name | N/A | Plus |
| Option Code | N/A | A89 |
| Torque Converter | Standard | Revised with Centrifugal Pendulum Damper |
| Auxiliary Oil Pump | N/A | Yes |
| Drive Modes | Standard | Optimized for “Eco” |
| Gearset Materials | Standard | Reduced Friction Design |
| Fluid Type | Red | Blue |
1.2. Hardware and Software Upgrades in the 722.9 Plus
The 722.9 Plus model includes significant hardware improvements, such as a revised torque converter with a centrifugal pendulum damper. According to Mercedes-Benz, this damper improves longevity, cooling, and reduces slip. An auxiliary oil pump provides adequate lubrication during stop/start, and the operating system is specifically designed for “Eco” drive modes. The gearset materials are designed to reduce friction, leading to quicker and smoother shifts.
1.3. Importance of Using the Correct Transmission Fluid
The early 722.9 used a red fluid similar to traditional ATF, while the Plus model used a blue fluid with much lower viscosity. These fluids are not compatible, so it’s crucial to know which one your transmission requires. Using the wrong fluid can cause significant damage and reduce the transmission’s lifespan. At CARDIAGTECH.NET, we emphasize the importance of using the correct fluid to maintain your Mercedes’ performance.
2. Identifying Your Mercedes 722.9 Transmission Fluid Type
Determining which fluid your Mercedes 722.9 transmission requires can be done in several ways. The method you choose depends on your willingness to get hands-on. Here are the most reliable methods.
2.1. Checking the Production Date
Earlier 722.9 models use red fluid, while later “Plus” models require blue fluid. Production of the 722.9 Plus models began on 06/21/2010. This means that all vehicles sold in the US with a 2012 model year or later will use blue fluid. Cars from 2010 or earlier will use red fluid. 2011 model-year vehicles may be fringe cases and need to be checked via their production date or VIN.
| Model Year | Production Date | Fluid Type |
|---|---|---|
| 2010 or earlier | Before 06/21/2010 | Red |
| 2011 | Check Production Date/VIN | Varies |
| 2012 or later | After 06/21/2010 | Blue |
2.2. Using a VIN Decoder
A VIN decoder can definitively identify the fluid needed for your transmission. Simply enter your vehicle’s VIN into a decoder such as VIN Decoderz. Once the information loads, check for the A89 option code. If present, your vehicle uses blue fluid.
FCP_Euro_Mercedes_722.9_Transmission_Fluid Guide_
2.3. Verifying Transmission Model and Serial Number
You can also verify the fluid type by locating the transmission model number and serial on the VIN Decoder page. Compare this information against official Mercedes documentation. For example, a 2012 E550 with a 722.9 has the A89 option code, indicating it uses blue fluid. The transmission model is 722.909, and the serial number is 3629862. According to Mercedes documentation, serial numbers after 2834527 use blue fluid, confirming the VIN decoder’s information.
| Transmission Model | Serial Number | Fluid Type |
|---|---|---|
| 722.9 | Below 2834527 | Red |
| 722.9 Plus | 2834527 and above | Blue |
3. Physical Inspection of the 722.9 Transmission
Inspecting the transmission itself can provide valuable clues about the required fluid type. This method is more subjective, especially if you are not the original owner, as parts may have been upgraded or the wrong fluid installed previously.
3.1. Examining the Transmission Pan
The 722.9 and 722.9 Plus transmissions use different styles of transmission pans due to the different filters they accommodate. The 722.9 Plus pan has deeper dimples and additional clips. It is also deeper to accommodate the SmartMedia Triple filter.
FCP_Euro_Mercedes_722.9_Transmission_Fluid Guide_Oil_Pan_Differences
3.2. Checking the Overflow Plug Color
The overflow plug color also differs between the two models. A green overflow pipe indicates the 722.9 Plus SmartMedia filter and deeper pan. Traditional earlier 722.9 models use a white overflow pipe.
| Feature | Early 722.9 | Late 722.9 Plus |
|---|---|---|
| Pan Dimples | Shallow | Deeper |
| Pan Clips | Fewer | More |
| Pan Depth | Shallower | Deeper |
| Overflow Plug Color | White | Green |
3.3. Locating the Serial Number on the Transmission
The safest physical method to determine the fluid type is to find the transmission-specific code stamped on the unit and compare it against the Mercedes inflection point. This code is located between the bell housing and transmission pan.
FCP Euro 722.9 Transmission Guide Serial Numbers
The stamp has three lines:
- Part number of the overall assembly.
- Model of the transmission and its variant.
- Serial number of the transmission.
If the serial number is “2834527” or higher, the transmission uses blue fluid. If it is lower, it uses red fluid.
4. Service Intervals and Fluid Information
Knowing the correct service intervals and fluid requirements is crucial for maintaining your Mercedes 722.9 transmission.
4.1. 722.9 “Red” Fluid
- Mercedes BeVo Requirement: 236.14
- Service Interval: Every ~40,000 miles
4.2. 722.9 Plus “Blue” Fluid
- Mercedes BeVo Requirement: 236.15
- Service Interval: Every ~70,000 miles
5. Upgrading and Retrofitting Your 722.9 Transmission
While you cannot easily upgrade your 722.9 to function exactly like a 722.9 Plus, you can retrofit some parts to improve reliability. One popular upgrade is installing the SmartMedia filter and deeper pan from the 722.9 Plus onto a traditional red-fluid 722.9.
FCP_Euro_Mercedes_722.9_Transmission_Fluid Guide_Smartmedia_Filter
5.1. SmartMedia Filter and Deeper Pan Retrofit
The SmartMedia filter is the latest in filtering technology for the 722.9. The deeper pan allows for greater fluid capacity and better lubrication. A retrofit kit includes everything needed to swap the SmartMedia filter and deeper pan onto a traditional red-fluid 722.9. Note that even with these upgrades, the transmission still requires red fluid.
5.2. Components of the Retrofit Kit
- SmartMedia Triple filter
- Deeper transmission pan
- Required overflow plug
All components must be installed together to complete the retrofit.
6. Troubleshooting Common 722.9 Transmission Issues
If you’re experiencing issues with your 722.9 transmission, the first step is to scan for fault codes with an OBDII scanner.
6.1. Initial Diagnostic Steps
- Scan for Fault Codes: Use an OBDII scanner to identify any fault codes.
- Check Fluid Level and Condition: Ensure the 722.9 has the appropriate amount of fluid and that the fluid is clean.
6.2. Addressing Drive Issues
For AMG models, replacing the conductor plate isn’t always possible. 722.907 models use a torque converter and can have a conductor plate, but other AMG vehicles use a wet-clutch system and require a full valve body replacement.
6.3. What to Do If the Incorrect Fluid Was Used
If the incorrect fluid was used, perform a drain and flush immediately. These gearboxes are built to specific tolerances, and the difference in viscosity between the red and blue fluids will cause damage.
7. Mercedes 722.9 Transmission Frequently Asked Questions
Here are some common questions about the Mercedes 722.9 transmission:
7.1. What should I do if the incorrect fluid color is being used in my 722.9?
If the incorrect fluid was used, perform a drain and flush immediately to prevent damage.
7.2. Can I upgrade my 722.9 to function like a 722.9 “Plus” so it takes the blue fluid?
Not easily. However, you can retrofit some parts from the Plus transmissions to improve reliability.
7.3. I’m having drive issues with my 722.9. Where should I start?
Start by scanning for fault codes with an OBDII scanner and checking the fluid level and condition.
7.4. How often should I service my 722.9 transmission?
Service intervals vary depending on the fluid type. Red fluid transmissions should be serviced every ~40,000 miles, while blue fluid transmissions should be serviced every ~70,000 miles.
7.5. What is the Mercedes BeVo requirement for the red fluid?
The Mercedes BeVo requirement for the red fluid is 236.14.
7.6. What is the Mercedes BeVo requirement for the blue fluid?
The Mercedes BeVo requirement for the blue fluid is 236.15.
7.7. Can I mix red and blue transmission fluids?
No, red and blue transmission fluids are not compatible and should never be mixed.
7.8. What is the SmartMedia filter?
The SmartMedia filter is an advanced transmission filter used in the 722.9 Plus transmissions, offering improved filtration and longevity.
7.9. Where can I find the serial number on my 722.9 transmission?
The serial number is stamped on the transmission case between the bell housing and the transmission pan.
7.10. What does the A89 option code signify?
The A89 option code signifies that the vehicle is equipped with the updated 722.9 Plus transmission, which uses blue fluid.
8. Why Choose CARDIAGTECH.NET for Your Mercedes 722.9 Transmission Needs
At CARDIAGTECH.NET, we understand the complexities of maintaining your Mercedes-Benz. Our expert advice and high-quality products ensure your vehicle performs at its best.
8.1. Expert Guidance
Our team provides accurate and reliable information to help you identify the correct fluid and service procedures for your 722.9 transmission. We stay updated with the latest industry standards and Mercedes-Benz specifications.
8.2. High-Quality Products
We offer a wide range of products designed to meet the specific needs of your Mercedes-Benz, including transmission fluids, filters, and retrofit kits. Our products are sourced from trusted manufacturers to ensure quality and reliability.
8.3. Comprehensive Solutions
From identifying the correct fluid type to providing troubleshooting tips, we offer comprehensive solutions for your Mercedes 722.9 transmission needs. Our goal is to help you maintain your vehicle efficiently and effectively.
8.4. Exceptional Customer Support
At CARDIAGTECH.NET, we prioritize customer satisfaction. Our team is available to answer your questions and provide support throughout your service journey. Contact us today for expert assistance and top-quality products.
9. Conclusion: Ensuring Optimal Performance with CARDIAGTECH.NET
Understanding the Mercedes A89 option code and the specific requirements of your 722.9 transmission is essential for maintaining your vehicle’s performance and longevity. Whether you need to identify the correct fluid type, upgrade your transmission, or troubleshoot common issues, CARDIAGTECH.NET is here to help. With our expert guidance, high-quality products, and comprehensive solutions, you can ensure your Mercedes-Benz continues to deliver a smooth and reliable driving experience.
Don’t let transmission troubles slow you down. Contact CARDIAGTECH.NET today and discover how our tools and expertise can help you keep your Mercedes-Benz running at its best.
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