MERCEDES 722.6 Transmission Transfer 163270220087 Benz 183K

( Type: Automatic Transmission ), ( Universal Fitment: No ), ( Country Of Origin: Germany ), ( UPC: 163270220087 )

Review MERCEDES benz Transmission Transfer Case Assembly 183k Tested fits W163 ML320 1998–1999

The **Mercedes-Benz 98 Series W163 ML320 Transmission Transfer Unit (Part Number: 163270220087, Model Code: 722.6)** is a precision-engineered component designed to deliver seamless power transfer and optimal performance within the iconic Mercedes-Benz ML-Class luxury SUV lineup. This transmission transfer unit is a critical element of the **7G-Tronic 8-speed automatic transmission system**, specifically tailored for the **ML320 (W163) model**, which combines the refined elegance of a Mercedes-Benz with the rugged capability of an SUV. Crafted with Mercedes-Benz s signature attention to detail, this transfer unit ensures smooth gear shifts, enhanced driving dynamics, and reliable operation under varying load conditions, whether navigating city streets or off-road terrains.

The **722.6 transmission transfer unit** is built to exacting standards, featuring a robust **aluminum housing** reinforced with high-strength alloys to withstand the demands of both urban commuting and adventurous driving. Inside, a sophisticated **planetary gear system** works in tandem with the transmission s hydraulic and electronic controls to provide precise torque distribution, minimizing power loss and maximizing efficiency. The unit incorporates **advanced clutch packs and friction materials**, including specialized **ceramic-coated plates**, which enhance durability and reduce wear over extended use. This design not only extends the lifespan of the transmission but also contributes to the ML320 s reputation for quiet, refined operation, even at higher speeds.

One of the standout features of this transfer unit is its **integrated torque converter lock-up clutch**, which optimizes fuel economy by engaging the converter at higher speeds, reducing slippage and improving overall efficiency. The **722.6** is also compatible with Mercedes-Benz s **electronic shift control (ECO mode)**, allowing drivers to tailor the transmission s behavior to their preferences whether prioritizing performance, comfort, or fuel efficiency. The unit s **sealed and filtered hydraulic system** ensures that gear engagement remains smooth and consistent, free from debris or contamination, which is particularly important for maintaining the ML320 s luxury driving experience.

For enthusiasts and mechanics alike, this transmission transfer unit represents a blend of **cutting-edge automotive engineering and Mercedes-Benz s commitment to quality**. Whether installed in a restored classic or a meticulously maintained modern ML320, the **163270220087 722.6 transfer unit** serves as a testament to the brand s dedication to performance, reliability, and timeless craftsmanship. Its precise machining, high-grade materials, and seamless integration with the **7G-Tronic transmission** make it an essential component for those seeking to preserve or enhance the driving dynamics of their Mercedes-Benz SUV.

### **Pros and Cons of Buying a Mercedes-Benz W163 ML320 (163270220087, 98 Model Year, 722.6 Transmission)**

#### **Overview**

The Mercedes-Benz W163 ML320 (2000 2005) is a mid-size luxury SUV with a 3.2L V6 engine paired with the 7G-Tronic 722.6 automatic transmission. This model is known for its refined ride, strong performance, and classic Mercedes-Benz build quality. However, like any vehicle, it has advantages and drawbacks depending on its condition, maintenance history, and intended use.

---

### **Pros**

1. **Strong Engine and Performance**

- The **3.2L M272 V6** produces **231 hp and 216 lb-ft of torque**, providing smooth acceleration and adequate power for highway driving and light towing (up to 3,500 lbs with proper equipment).

- The engine is reliable for its era, especially if well-maintained, and offers better fuel efficiency ( 15 18 MPG combined) compared to larger V8 models.

2. **722.6 Transmission (7G-Tronic)**

- The **722.6 is one of Mercedes most durable automatic transmissions** from the early 2000s, known for smooth shifting and longevity if properly serviced.

- Unlike some earlier Mercedes transmissions (e.g., 722.3), the 722.6 is less prone to major failures if fluid changes were done regularly.

- Supports **overdrive gears**, improving fuel economy on highways.

3. **Luxury and Comfort**

- Classic **Mercedes-Benz interior** with high-quality materials, comfortable seating, and a quiet cabin.

- **Air suspension (optional on ML320)** provides a smooth ride, though it can be finicky if not maintained.

- **AM/FM stereo with CD, Bluetooth (on later models), and power windows/locks** standard for its time.

4. **Reliability (If Well-Maintained)**

- The **M272 V6 is less prone to catastrophic failure** compared to some other Mercedes engines (e.g., M113 V8).

- The **722.6 transmission is robust** if fluid was changed every **60,000 80,000 miles** (a common oversight that can lead to premature wear).

- **No major recalls** for this specific model/transmission combo (unlike some later issues with 7G-Tronic variants).

5. **Resale Value and Collectibility**

- The **W163 ML320 is a sought-after model** among Mercedes enthusiasts, especially in good condition.

- **Lower mileage examples (under 80,000 miles) hold value well**, making it a good long-term investment if maintained properly.

6. **Safety and Handling**

- **Stable SUV platform** with good ground clearance ( 8.5 inches).

- **Standard ABS, traction control, and airbags** for its time.

- **Manual or automatic climate control** (depending on trim) for passenger comfort.

7. **Towing Capability (With Proper Setup)**

- Can tow **up to 3,500 lbs** with a trailer brake controller and proper hitch, making it useful for weekend trips.

---

### **Cons**

1. **Maintenance Costs and Complexity**

- **Mercedes parts and labor are expensive** expect to pay **$100 $200/hour** for repairs, especially if not at a dealership.

- **Timing chain stretch** (if not serviced, can cause engine knock requires **$1,500 $2,500** to replace).

- **Water pump failure** (often linked to timing chain issues, can cause overheating).

- **Air suspension leaks** (if equipped, can be costly to repair).

- **Electrical gremlins** (infotainment, windows, or sensors may fail over time).

2. **Transmission Fluid Changes Are Critical**

- The **722.6 is durable, but neglecting fluid changes leads to premature failure** (expect **$2,000 $3,500** for a rebuild if fluid was never changed).

- **Mercedes recommends changing fluid every 60,000 miles**, but many owners skip this, leading to **slipping gears, rough shifts, or complete failure**.

3. **Fuel Economy is Moderate**

- ** 15 18 MPG combined** (worse than modern hybrids or turbocharged engines).

- **Higher fuel costs** compared to smaller SUVs or sedans.

4. **Rust and Body Issues**

- **Early W163 models (pre-2003) are prone to rust**, especially in snow-belt regions.

- **Check for rust under the rocker panels, wheel wells, and subframe** repairs can be **$1,000 $3,000 **.

- **Paint quality varies** some examples have poor clear coat or body filler issues.

5. **Electrical and Infotainment Limitations**

- **No modern connectivity** (no Apple CarPlay/Android Auto, limited USB ports).

- **Radio and climate controls can be finicky** some models have **dead buttons or failing displays**.

- **No backup camera** (standard on newer models).

6. **Towing and Payload Limitations**

- While it can tow, it s **not as capable as a full-size SUV** (e.g., G-Class or GLE).

- **Rear-wheel-drive only** (no 4WD option on ML320, unlike the ML500 or ML350 4Matic).

7. **Depreciation and Market Saturation**

- **Used market is flooded** with W163 models, so pricing can be competitive but may require negotiation.

- **Not as practical for daily commuting** compared to modern SUVs (lower fuel efficiency, higher maintenance).

---

### **Key Considerations Before Buying**

1. **Service History is Critical**

- **Verify every oil change, transmission fluid change, and timing belt service.**

- **Ask for maintenance records** if none exist, assume the worst.

- **Get a pre-purchase inspection (PPI)** from a **Mercedes specialist** ( $150 $250).

2. **Check for Common Failures**

- **Listen for engine knock** (timing chain stretch).

- **Test drive and check for rough shifts** (transmission fluid condition).

- **Inspect for rust** (especially in snowy climates).

- **Test all electronics** (windows, locks, radio).

3. **Budget for Potential Repairs**

- **Expect $5,000 $10,000 in repairs** over 5 7 years if not well-maintained.

- **Timing chain replacement ( $2,000 $2,500) is the biggest risk.**

- **Transmission rebuild ( $2,000 $3,500) if fluid was never changed.**

4. **Alternative Options**

- **GLE 350 (W164, 2006 2011)** More refined, better tech, but still expensive to maintain.

- **E-Class (W211, 2003 2010)** More practical, better fuel economy.

- **Toyota Highlander (2005 2010)** Bulletproof, lower maintenance.

- **Lexus RX330 (2003 2008)** Similar luxury, better reliability.

---

### **Final Recommendation**

You **find a well-documented example** with **full service records**, especially **transmission and timing belt maintenance**.

You **plan to drive it sparingly** (e.g., weekend cruiser, occasional highway use) and **budget for potential repairs**.

You **value the classic Mercedes-Benz driving experience** and don t mind higher maintenance costs.

You **get a pre-purchase inspection** and **negotiate aggressively** (aim for **$8,000 $12,000** for low-mileage examples in good condition).

You **live in a dry climate** (rust is a major concern in snowy/salty regions).

You **can t afford unexpected repairs** (timing chain, transmission, or electrical issues).

You **need a daily driver** (fuel economy and maintenance costs make it impractical).

The **seller has no service records** or the car shows signs of neglect (rough shifts, oil leaks, electrical issues).

You **prefer modern tech** (no Apple CarPlay, poor infotainment, no backup camera).

This ML320 is

Details:

Should fit 98-99 ML320 only. You are viewing a good, used transmission from 1998 Mercedes ML320. Please match our part number with yours to ensure fitment. Items with free shipping is to the CONTINENTAL US ONLY.

part #: 163270220087 prices

• $95.00-$404.95

specifications autotransmissionsgo:

• for models: W163, Ml320
• for makes: Mercedes
• for years: 1998-1999
• type: Automatic Transmission
• universal fitment: No
• country of origin: Germany
• upc: 163270220087

shipping autotransmissionsgo:

offer autotransmissionsgo:

• started: February 28, 2026
• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 1

general autotransmissionsgo:

• condition: Used
• Car Truck Parts Accessories > Transmission Drivetrain > Automatic Transmission

payments autotransmissionsgo:

• other
• wallet: Apple-pay
• credit card: Diners-club

returns autotransmissionsgo:

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

seller autotransmissionsgo:

• rating: 100.0%
• # reviews: 6715
• city: Asheboro, North Carolina

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