MERCEDES R2202724324 Automatic Gearbox Drum Benz 722.9

( Manufacturer Part Number: R2202724324 ), ( Oe/oem Part Number: Gl450 ), ( Transmission Type: Automatic ), ( Country Of Origin: Germany )

Review MERCEDES benz Automatic Gearbox Drum Assembly fits W164 ML350 2007

The **Mercedes-Benz R2202724324 Automatic Gearbox Drum (722.9 07)** is a meticulously engineered transmission component designed exclusively for the **W164 chassis platform**, specifically tailored for the **ML350 (C207) model series** produced between 2011 and 2019. This drum assembly is a critical part of the **7G-Tronic 722.9 automatic transmission**, a sophisticated seven-speed automatic gearbox renowned for its seamless shifting performance, enhanced fuel efficiency, and robust durability. Crafted from high-grade materials and precision-machined to exacting specifications, this drum serves as the foundational element that houses the internal clutch packs, planetary gears, and hydraulic mechanisms responsible for executing smooth, precise gear transitions. The **R2202724324** drum is engineered to withstand the demanding torque outputs of the ML350 s powerful **3.0-liter inline-six engine**, which generates up to **367 horsepower and 379 lb-ft of torque**, ensuring reliable operation under both everyday driving conditions and spirited acceleration. Its robust construction minimizes wear and tear, reducing the risk of premature failure and extending the lifespan of the entire transmission system. This drum is a direct-fit replacement, compatible with the original equipment specifications, and is designed to integrate seamlessly with the **722.9 07** transmission s hydraulic and electronic control systems, maintaining optimal performance and shift quality. Whether used in a restoration project, a performance upgrade, or as a preventive maintenance solution, this drum is an essential component for preserving the integrity and efficiency of the ML350 s legendary automatic transmission. Its inclusion in a repair or rebuild ensures that the vehicle retains its signature driving dynamics smooth, responsive, and dependable while adhering to Mercedes-Benz s exacting standards of quality and engineering excellence.

### **Pros and Cons of Buying a Mercedes-Benz R2202724324 (ML350, W164, 7G-Tronic 722.9 Automatic, Drum Gearbox)**

#### **Overview**

The **Mercedes-Benz ML350 (W164)** with the **7G-Tronic 722.9 automatic transmission** (often referred to as a "drum gearbox" due to its older hydraulic design) is a mid-sized luxury SUV from the late 1990s to early 2000s. This model was powered by the **M113 V8 engine (3.5L, 238 hp)**, which paired well with the **722.9 automatic**, though the transmission has some well-known drawbacks.

---

### **Pros**

1. **Strong Engine Performance**

- The **M113 V8 (3.5L)** is a robust, naturally aspirated engine known for reliability and durability. It produces **238 hp and 302 lb-ft of torque**, providing solid acceleration and towing capability (up to **3,500 lbs** when properly maintained).

- The V8 offers a smooth, refined power delivery typical of Mercedes luxury vehicles from this era.

2. **Luxury & Comfort**

- The **W164 ML350** was a premium SUV with high-quality interior materials, comfortable seating, and a spacious cabin (seats up to 7 passengers).

- Features like **power-adjustable seats, leather upholstery, and a premium sound system** (in higher trims) enhance the driving experience.

- The **suspension is well-tuned for comfort**, making it suitable for both city driving and light off-roading (though not true off-road capable).

3. **Reliability of the V8 Engine**

- The **M113 V8** is one of the most reliable Mercedes engines from the pre-turbo era. With proper maintenance (regular oil changes, timing belt replacement, and cooling system checks), it can easily exceed **200,000 miles**.

- Unlike later turbocharged Mercedes engines, this V8 is less prone to **carbon buildup or turbo-related issues**.

4. **Classic Mercedes Build Quality**

- The **W164 chassis** is sturdy, and the **body structure** is solid, making it a durable vehicle for its age.

- The **transmission (722.9) is a proven Mercedes automatic**, though it has quirks, it is not as prone to catastrophic failure as some other older automatics.

5. **Resale Value & Collectibility**

- The **ML350 (W164)** is a **cult favorite** among Mercedes enthusiasts, especially in the **ML320/ML350 V8** form. Well-maintained examples hold value well.

- The **V8 model is rarer** than the inline-6 versions, making it more desirable for collectors.

6. **Towing & Hauling Capability**

- With the **V8 and 722.9 transmission**, the ML350 can tow **up to 3,500 lbs** when properly equipped (with a trailer hitch and cooling system upgrades).

- This makes it a practical choice for those needing a **luxury SUV for towing a boat or camper**.

7. **Classic Mercedes Driving Experience**

- The **steering feel, gear shifts (when in good condition), and overall driving dynamics** are well-balanced for a vehicle of this size and era.

- The **722.9 transmission**, while not as smooth as modern automatics, has a **distinctive Mercedes driving feel** that enthusiasts appreciate.

---

### **Cons**

1. **722.9 Automatic Transmission Issues**

- The **722.9 is a hydraulic drum-based automatic**, meaning it lacks the **electronic control and precision** of modern transmissions.

- **Slipping gears** (especially under load or when shifting from park to drive).

- **Delayed engagement** when shifting from neutral to drive.

- **Rough or jerky shifts** (common in older Mercedes automatics).

- **Fluid leaks** (from the torque converter or transmission housing).

- **Repairs can be expensive**, and finding a **specialist** familiar with this transmission is difficult.

- **No overdrive gear** (unlike later 7G-Tronic models), which can make highway cruising feel less efficient.

2. **Fuel Economy**

- The **V8 engine is thirsty**, averaging **14-16 MPG combined** (city/highway).

- This is **significantly worse** than modern SUVs, making it **costly to operate** for daily driving.

3. **Maintenance Costs**

- **Oil changes** should be done **every 5,000 miles** (or as recommended) due to the **high heat output of the V8**.

- **Timing belt replacement** is critical (typically every **60,000-100,000 miles**) failure can cause **catastrophic engine damage**.

- **Cooling system maintenance** is essential (Mercedes V8s are prone to **overheating** if the radiator, thermostat, or water pump fails).

- **Suspension and bushings** wear out over time, requiring **strut replacements and sway bar links**.

4. **Age-Related Wear & Tear**

- **Brakes, tires, and suspension** will need **frequent replacements** as the vehicle ages.

- **Electrical issues** (common in older Mercedes) may arise, such as **faulty sensors, window regulators, or infotainment glitches**.

- **Rust** can be an issue, especially in **frame rails, wheel wells, and undercarriage** (depending on climate and storage conditions).

5. **High Repair Costs**

- **Mercedes is not cheap to maintain**, and **labor rates** for specialty repairs (especially transmission work) can be **high**.

- **OEM parts** are expensive, and **aftermarket parts** may not always be reliable.

- **Transmission rebuilds** (if needed) can cost **$3,000-$6,000 **, depending on the extent of damage.

6. **Modern Safety & Technology Limitations**

- **No modern safety features** (no ABS, traction control, or stability control in base models later models added these).

- **No Bluetooth, USB, or advanced infotainment** (the **CD-based system is outdated**).

- **Poor fuel injection reliability** (some V8s develop **fuel pump or injector issues** over time).

7. **Environmental & Emissions Concerns**

- The **V8 is not fuel-efficient**, and **modern emissions regulations** make it impractical for some regions.

- **Smog checks** may be difficult to pass in areas with strict emissions standards.

8. **Market Availability & Parts Supply**

- While **not rare**, finding **genuine Mercedes parts** can be challenging, especially for **older models**.

- **Used transmission parts** (for the 722.9) are **hard to source**, increasing repair costs.

---

### **Ending Conclusion**

The **Mercedes-Benz ML350 (W164) with the 722.9 automatic** is a **strong, luxurious, and capable SUV** for the right buyer. Its **V8 engine is reliable, powerful, and well-suited for towing**, while the **interior remains a benchmark for Mercedes luxury**. However, the **722.9 transmission is a significant drawback**, with **slipping, rough shifts, and high repair costs** being major concerns.

- **Enthusiasts who appreciate classic Mercedes driving dynamics** and don t mind transmission quirks.

- **Owners who need a **towing-capable luxury SUV** and can afford **higher maintenance costs**.

- **Those who prioritize **build quality and V8 performance** over modern convenience.

- **Collectors or buyers who see it as a **long-term investment** (due to its cult status).

- **Daily drivers** who want **smooth, reliable automatic shifts**.

- **Budget-conscious buyers** (fuel costs, maintenance, and repairs add up).

- **Those who need **modern safety or infotainment features**.

- **People in areas with **strict emissions laws** or high fuel prices**.

---

### **Final Recommendation**

You **love Mercedes classics** and don t mind **transmission quirks** for the sake of **V8 power and luxury**.

You **need a towing vehicle** and can **budget for maintenance**.

You **find a well-documented, low-mileage example** (under **100,000 miles**) with **full service records**, especially for **timing belt, transmission fluid, and cooling system checks**.

You re **prepared for potential transmission issues** and have **funds set aside for repairs**.

You **expect a smooth, modern automatic shift experience**.

You **can t afford high maintenance costs**

Details:

Automatic Gearbox Drum Assembly R 722.9 07 Mercedes Benz W164 ML350.

part #: r2202724324 prices

• $150.00-$299.99

specifications universajoin:

• for models: W164, Ml350
• for makes: Mercedes
• for years: 2007
• mpn: R2202724324
• oe/oem part number: Gl450
• transmission type: Automatic
• country of origin: Germany

seller universajoin:

• city: Glen Saint Mary, Florida
• # reviews: 516
• rating: 99.2%

payments universajoin:

• other
• credit card: Discover
• wallet: Paypal

returns universajoin:

• policy: Returns Accepted
• paid by: Buyer
• time: 30 Days

shipping universajoin:

• type: Fixed
• service: USPS Ground Advantage
• transit: 3-8 Days
• cost: $20.00
• class: Standard
• carrier: USPS

general universajoin:

• Transmission Drivetrain > Driveshafts Parts > Driveshafts
• condition: Used

offer universajoin:

• sold: 0
• quantity: 1
• availability: In Stock
• options: Ship-to-home
• started: February 18, 2026

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