fits make: Mercedes. year: 1994–1997.

( Model: C280 C36 ), ( Part Type: Transmission ), ( Genuine Oem: Yes ), ( Oem Part Number: 202-270-03-00-80 ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Make: Mercedes-benz ), ( Year: 1994 1995 1996 1997 ), ( Parts Included: Only Part Reference 0 On The Diagram Is Included ), ( Replaces Part Number: 2022700300, 202270030060, 202270030088 ), ( UPC: 202270030080 )
The **Mercedes-Benz 202-270-03-00-80** is a high-performance, electronically controlled automatic transmission designed for integration with a range of Mercedes-Benz engines, particularly those found in mid-size and luxury sedans, SUVs, and performance-oriented models from the late 1990s through the early 2010s. This transmission represents a sophisticated evolution in automotive drivetrain technology, combining precision engineering with advanced hydraulic and electronic systems to deliver seamless gear shifts, enhanced fuel efficiency, and robust durability. Built upon Mercedes-Benz s legendary attention to refinement, the **202-270-03-00-80** features a **four-speed automatic** configuration with a torque converter, allowing it to handle power outputs ranging from approximately **150 to 300 horsepower**, depending on the paired engine. Its compact yet robust design incorporates a **planetary gearset** and a **multi-disc clutch pack**, enabling smooth acceleration and efficient power transfer while minimizing wear over extended periods of use.
At the heart of this transmission lies a **highly integrated electronic control module (ECM)**, which continuously monitors engine speed, vehicle speed, throttle position, and other critical parameters to optimize shift points and torque delivery. This system ensures that the transmission responds dynamically to driver inputs, whether during spirited driving or relaxed cruising, while also adapting to varying road conditions. The **torque converter**, a key component of this automatic transmission, incorporates a **lock-up clutch** that engages at higher speeds to improve fuel economy by eliminating slippage between the engine and transmission. This feature, combined with the transmission s **hydraulically actuated valve body**, allows for precise modulation of fluid flow, ensuring that shifts are both rapid and nearly imperceptible to the driver.
Constructed from high-grade materials, including **cast aluminum housings** and **precision-machined steel components**, the **202-270-03-00-80** is engineered to withstand the demands of both urban commuting and high-performance driving. The transmission s **sealed gear and bearing assemblies** are designed to minimize friction and heat buildup, contributing to longevity even under heavy loads. Additionally, its **integrated oil pump** circulates transmission fluid through the system, lubricating internal components and dissipating heat to prevent premature wear. The fluid itself typically a **Mercedes-Benz ATF (Automatic Transmission Fluid) or a compatible synthetic alternative** plays a crucial role in maintaining optimal performance, as it lubricates the clutches, seals, and bearings while also acting as a hydraulic medium for shift actuation.
For maintenance and reliability, the **202-270-03-00-80** is designed with accessibility in mind, featuring a **removable torque converter housing** that allows for easy inspection and replacement of the torque converter and fluid pump. The transmission s **solenoid pack** and **valve body** are also modular, enabling technicians to diagnose and repair common issues such as **hunting, delayed shifts, or fluid leaks** without necessitating a full rebuild. However, like all high-performance automatic transmissions, it requires **regular fluid changes** (typically every **60,000 to 100,000 miles**, depending on driving conditions) and **proper alignment** of the torque converter to maintain peak efficiency. When properly cared for, this transmission delivers **reliable, smooth operation** for tens of thousands of miles, embodying Mercedes-Benz s commitment to both performance and longevity in its drivetrain systems.
Whether paired with a **V6 engine** in a model like the **E350 or E500**, or a **turbocharged inline-6** in a performance-oriented variant such as the **C204 AMG**, the **202-270-03-00-80** stands as a testament to Mercedes-Benz s engineering prowess. Its **precise shift quality, adaptability to various power outputs, and robust construction** make it a sought-after component for both restoration projects and high-mileage vehicles seeking a reliable automatic transmission solution. For enthusiasts and mechanics alike, understanding the intricacies of this transmission from its **electronic shift logic** to its **hydraulic precision** reveals why it remains a benchmark in automotive drivetrain technology.
The Mercedes-Benz 202-270-03-00-80 transmission is a **7G-Tronic 722.9** automatic transmission, commonly found in older Mercedes-Benz models (typically from the late 2000s to early 2010s). Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.
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### **Pros of the 202-270-03-00-80 Transmission**
1. **Smooth and Responsive Shifting**
The 7G-Tronic 722.9 is known for its relatively smooth operation compared to earlier Mercedes transmissions. It uses a torque converter with a lock-up clutch, which improves fuel efficiency and reduces wear over time when properly maintained.
2. **Wide Gear Ratios**
This transmission offers a broad range of gear ratios, allowing for better fuel economy in highway driving and improved towing capability when equipped with the right drivetrain.
3. **Electronic Shift Control**
The transmission features electronic shift logic, which can adapt to driving conditions (e.g., aggressive driving, towing, or fuel-saving modes). Some models also include a manual shift mode (Tiptronic) for more engaging driving.
4. **Common in Older Mercedes Models**
Since this transmission is widely used in popular Mercedes-Benz vehicles (e.g., C-Class, E-Class, GLK, and some Sprinter models), finding replacement parts, rebuild kits, and mechanics familiar with it is relatively easier than for rare transmissions.
5. **Proven Reliability (When Maintained)**
With proper maintenance including regular fluid changes (every 60,000 100,000 miles) and addressing minor issues early this transmission can last well beyond 150,000 miles. Many owners report trouble-free operation for 200,000 miles.
6. **Compatibility with Aftermarket Upgrades**
The 7G-Tronic is compatible with aftermarket performance chips, wider-ratio gear sets, and other modifications, allowing enthusiasts to enhance performance and drivability.
7. **Lower Cost of Replacement Parts**
Compared to newer Mercedes transmissions (e.g., 9G-Tronic), the 7G-Tronic has a lower cost for rebuilds, fluid, and components, making repairs more affordable.
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### **Cons of the 202-270-03-00-80 Transmission**
1. **Electronic Control Unit (ECU) Issues**
The transmission relies heavily on its ECU for shift logic. Over time, the ECU can fail or develop software glitches, leading to erratic shifting, delayed engagement, or complete lockout. Replacing the ECU or reflashing it can be costly.
2. **Torque Converter Problems**
The torque converter in this transmission is prone to wear, especially if the fluid hasn t been changed regularly. Symptoms include slipping, delayed engagement, or a "whining" noise during acceleration. Replacing the torque converter is a labor-intensive and expensive repair (often $1,500 $3,000 ).
3. **Solenoid and Valve Body Failures**
The solenoids and valve body control the flow of fluid to the clutches and bands. Over time, these can clog, leak, or fail, causing harsh shifts, delayed engagement, or complete transmission failure. Cleaning or replacing the valve body is a common repair, but it requires specialized tools and expertise.
4. **Fluid Degradation**
The transmission fluid in this system degrades quickly, especially in high-temperature or stop-and-go driving conditions. Old or contaminated fluid can cause slipping, overheating, and accelerated wear of internal components. Many mechanics recommend changing the fluid every 60,000 miles, but many owners neglect this.
5. **Clutch and Band Wear**
The internal clutches and bands (used for shifting) can wear out over time, leading to slipping or failure to engage certain gears. This is often a symptom of neglected fluid changes or excessive heat buildup.
6. **Diagnostic Challenges**
Mercedes-Benz dealerships and even some independent shops may be less familiar with this transmission, leading to higher diagnostic fees or incorrect repairs. Some mechanics may recommend a full rebuild when a simpler fix (e.g., fluid change or valve body cleaning) would suffice.
7. **Potential for Complete Failure**
If neglected, this transmission can fail catastrophically, requiring a full rebuild or replacement. Rebuilding costs can range from $2,500 $4,500, depending on labor rates and parts. A used rebuilt transmission may be cheaper but carries risks if not sourced from a reputable shop.
8. **Limited Longevity Compared to Manuals**
While automatic transmissions like this can last a long time with care, they generally have a shorter lifespan than well-maintained manual transmissions in similar vehicles.
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### **Common Symptoms of Trouble**
If you re considering buying a vehicle with this transmission, watch for these warning signs:- **Slipping gears** (transmission doesn t hold engagement).
- **Delayed or harsh shifts** (jerky acceleration).
- **Transmission fluid leaks** (check for red-brown fluid under the car).
- **Overheating** (check for burning smell or warning lights).
- **Transmission warning lights** (e.g., "Check Transmission" or "Service Transmission").
- **Whining or grinding noises** (often indicates torque converter or clutch issues).
- **Transmission fluid that s dark, burnt, or smells burnt** (sign of contamination).
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### **Conclusion**
The **Mercedes-Benz 202-270-03-00-80 (7G-Tronic 722.9) transmission** is a capable and smooth automatic transmission when properly maintained. It offers good shifting performance, fuel efficiency, and a wide range of gear ratios, making it suitable for daily driving, light towing, and modifications. However, its electronic complexity, reliance on fluid condition, and susceptibility to torque converter and solenoid failures mean it requires **regular maintenance and attentive ownership**.
If you re buying a vehicle with this transmission, **prioritize models with a documented service history**, especially for fluid changes. Avoid vehicles with **neglected maintenance, slipping, or overheating issues**. While repairs can be costly, the transmission is not inherently "unreliable" it s more about **preventative care**.
For enthusiasts or those who enjoy working on their vehicles, this transmission can be a rewarding project. For casual buyers, the key is **due diligence in inspection and maintenance**.
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### **Recommendation**
1. **If Buying Used:**- **Get a pre-purchase inspection** focused on the transmission, including a fluid check and test drive.
- **Verify the service history**, especially for fluid changes. If the fluid hasn t been changed in over 60,000 miles, assume it s degraded.
- **Test drive for smooth shifting, no slipping, and no warning lights**. Pay attention to acceleration and deceleration.
- **Budget for potential repairs** (e.g., valve body cleaning, fluid change, or torque converter replacement).
2. **If Considering a Repair:**- **Start with simple fixes**: Fluid change, filter replacement, and valve body cleaning are low-cost solutions that can extend the transmission s life.
- **Avoid dealership repairs** unless necessary many independent shops specializing in Mercedes transmissions can perform rebuilds or repairs more affordably.
- **Consider a rebuild kit** if the transmission is failing but the shell is intact. A reputable rebuild can be cheaper than a full replacement.
3. **If Planning to Modify:**- The 7G-Tronic is mod-friendly, but **upgrading the torque converter or fluid cooler** can improve performance and longevity. Ensure any modifications are compatible with the transmission s limitations.
4. **Alternative Considerations:**- If you re looking for a **long-term, low-maintenance automatic**, newer Mercedes transmissions (e.g., 9G-Tronic) may offer better reliability, but they come with higher repair costs.
- If you prefer **simplicity and durability**, a manual transmission or a well-maintained older automatic (e.g., 5G-Tronic) might be a better choice.
**Final Verdict:**The **202-270-03-00-80 transmission is a solid choice for those who are willing to invest in maintenance and are prepared for potential repairs**. It s not inherently bad it s a transmission that **demands care**. For the right buyer (someone who checks fluid, addresses issues early, and isn t afraid of a repair bill), it can provide **many years of reliable service**. For those who neglect maintenance, it can become a costly headache. **Always prioritize a vehicle with a clean transmission history.**
Genuine Mercedes-Benz Automatic Transmission Assembly 202-270-03-00-80: Parts: C280. Trans Code-722.4. Electrical parts are not returnable. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer.
Parts must be resalable and in the original packaging.