MERCEDES Automatic Transmission 400-62112 Benz 3.0L

( Manufacturer Part Number: R350 ), ( Conditions Options: At, Awd ), ( Genuine Oem: Yes ), ( Make: Mercedes-benz ), ( Type: Automatic Transmission ), ( Ipn: 400-62112 ), ( Manufacturer Warranty: 60 Day )

Review MERCEDES benz Automatic Transmission From 3.0l fits R350 AWD 2012

The **Mercedes-Benz 400-62112 AWD Automatic Transmission (722.6) for the 2012 R350 3.0L** is a high-performance, precision-engineered transmission designed to deliver seamless power delivery and unmatched driving dynamics for the iconic Mercedes-Benz R-Class. This **7-speed automatic transmission** is a hallmark of Mercedes-Benz s commitment to luxury, sophistication, and cutting-edge automotive technology, tailored specifically for the **R350 3.0L** a model renowned for its blend of opulence, versatility, and off-road capability. Engineered with **AWD (All-Wheel Drive)** in mind, this transmission ensures optimal torque distribution across all four wheels, enhancing traction, stability, and responsiveness whether navigating urban highways, winding mountain roads, or rugged off-road terrain. The **722.6** transmission system incorporates **adaptive shift logic**, which continuously learns driver preferences to optimize gear shifts for efficiency, comfort, and performance, reducing lag and maximizing acceleration when needed.

At its core, the **400-62112** is built with **high-strength materials and advanced manufacturing techniques**, including **multi-plate wet clutches** and a **robust torque converter** that efficiently transfers power from the **3.0L V6 engine** to the wheels. The transmission s **hydraulic valve body** and **electronic control module (ECM)** work in tandem to regulate fluid pressure, shift timing, and gear engagement with precision, ensuring smooth transitions even under heavy loads. This system is also equipped with **adaptive shift programming**, which adjusts to driving conditions such as steep inclines, towing, or aggressive acceleration to prevent premature wear while maintaining the R350 s signature **refined yet spirited** driving experience.

For the **2012 R350**, which often serves as both a daily driver and an adventurer s companion, this transmission is a critical component in achieving **balanced performance and durability**. The **AWD configuration** ensures that power is dynamically allocated to the wheels that need it most, whether tackling slippery roads, deep sand, or steep off-road trails. The **7-speed layout** provides a wide range of gear ratios, allowing the engine to operate efficiently across a broad RPM spectrum, whether cruising at highway speeds or accelerating from a standstill. Additionally, the transmission s **robust construction** and **high-quality lubrication system** contribute to longevity, reducing the likelihood of costly repairs and ensuring reliability over thousands of miles.

Beyond its mechanical prowess, the **400-62112** is a testament to Mercedes-Benz s dedication to **driver engagement and luxury**. The transmission s **smooth, near-instantaneous shifts** eliminate the jarring transitions often associated with older automatic transmissions, while the **adaptive shift logic** allows for a highly personalized driving experience. Whether the driver prefers **quick, sporty shifts** or **buttery-smooth, relaxed transitions**, the system adapts accordingly, enhancing both comfort and enjoyment. The **AWD system** further amplifies this by providing **enhanced stability control**, reducing understeer or oversteer in challenging conditions, and delivering a sense of confidence that is characteristic of Mercedes-Benz s engineering excellence.

For enthusiasts and owners seeking to maintain or restore their **2012 R350 3.0L**, this transmission is a **critical replacement or upgrade component** that ensures the vehicle retains its performance integrity and luxury appeal. Whether used in a **restomod project**, a **full rebuild**, or as a **direct replacement for a failing unit**, the **400-62112** brings the R350 back to its intended level of sophistication and capability. Its compatibility with the **R350 s AWD system**, **3.0L V6 engine**, and **electronic stability controls** makes it an essential part of preserving the vehicle s original character while future-proofing it for years of dependable service. With its **precision engineering, adaptive intelligence, and Mercedes-Benz quality**, this transmission is not just a mechanical component it s a cornerstone of the R350 s legendary driving experience.

### **Pros and Cons of Buying a 2012 Mercedes-Benz R350 3.0L (400-62112 AWD, Automatic Transmission)**

#### **Pros**

1. **Strong Engine and Performance**

The 3.0L V6 engine in the R350 is a robust powerplant, capable of producing around **265 horsepower and 262 lb-ft of torque**, which provides a good balance of power and efficiency for a luxury SUV. The AWD system enhances traction in various conditions, making it suitable for light off-road or snowy environments.

2. **Luxury and Comfort**

Mercedes-Benz is renowned for its high-end interior materials, including premium leather, wood or aluminum trim, and advanced climate control. The spacious cabin offers comfortable seating for five (or seven in some trims), with ample legroom and headroom.

3. **Smooth Automatic Transmission**

The **7G-Tronic automatic transmission** (common in this model) is generally reliable and provides smooth shifting, though some owners report occasional hesitation or delayed engagement something to monitor during test drives.

4. **All-Wheel Drive (AWD)**

The AWD system improves stability and handling, particularly in adverse weather or on uneven surfaces. This is a significant advantage over FWD models in regions with poor road conditions.

5. **Safety Features**

The R350 comes equipped with standard safety features such as **stability control, traction control, anti-lock brakes (ABS), and multiple airbags**. Some models may also include **pre-collision braking** or **lane-keeping assist**, depending on the trim.

6. **Resale Value**

Mercedes-Benz vehicles, especially well-maintained ones, hold their value reasonably well compared to some competitors. The R350 is a mid-range model, so it strikes a balance between affordability and prestige.

7. **Reliability (With Proper Maintenance)**

If the vehicle has been **regularly serviced**, the 3.0L V6 and AWD system are generally reliable. However, like many Mercedes, it requires **high-quality oil changes, timing belt inspections, and transmission fluid flushes** to avoid costly repairs.

8. **Spacious Cargo Area**

The R350 offers a **large cargo capacity** (up to 20.5 cu. ft. in rear-seating positions), making it practical for families or those needing extra storage.

9. **Comfortable Ride**

The suspension is well-tuned for a smooth ride on highways, though it may feel slightly soft over rough roads compared to sportier SUVs.

10. **Brand Prestige**

Owning a Mercedes-Benz carries prestige, and the R350 is a solid choice for those who value luxury without the extreme cost of higher-end models like the GLE 550.

---

#### **Cons**

1. **Higher Maintenance Costs**

Mercedes-Benz vehicles are **expensive to maintain**, with parts and labor costs often exceeding those of Japanese or Korean luxury brands. Common issues include:

- **Timing belt/replacement** (critical to avoid catastrophic engine failure).

- **Transmission fluid changes** (neglecting this can lead to rough shifting or failure).

- **Suspension and steering components** (struts, bushings, and control arms wear out over time).

- **Electrical gremlins** (infotainment glitches, sensor failures).

2. **Potential Transmission Issues**

Some owners report **rough shifting, delayed engagement, or even transmission failure** in the 7G-Tronic automatic. A **pre-purchase inspection (PPI) is highly recommended** to check fluid condition and internal health.

3. **Fuel Economy is Moderate**

The R350 averages around **16-18 MPG in the city and 22-24 MPG on the highway**, which is decent but not exceptional for a luxury SUV. Diesel options (if available) would improve efficiency but are less common in this model.

4. **Electrical Problems**

- **Infotainment system malfunctions** (screen freezes, Bluetooth connectivity problems).

- **Sensor failures** (parking sensors, rain sensors, or driver assistance systems).

- **Power window or door lock failures**.

5. **Depreciation**

While Mercedes retains value better than some brands, luxury SUVs still lose **significant value over time**. A 2012 model will have **lower resale value** compared to newer luxury alternatives.

6. **Noise and Vibration Issues**

Some owners complain about **wind noise at highway speeds** or **engine vibrations** (especially if the engine mounts wear out). AWD models may also have **slightly more road noise** than FWD counterparts.

7. **Parts Availability and Wait Times**

Older Mercedes models may have **longer wait times for parts**, and some components (especially aftermarket) can be expensive.

8. **Sporty Handling Can Be Overwhelming**

While the R350 is comfortable, its **sport-tuned suspension** can make it feel less forgiving on rough roads compared to more plush luxury SUVs like the Cadillac Escalade or Lincoln Navigator.

9. **Potential for Hidden Damage**

- **Rust** (especially in snow-belt regions).

- **Accident damage** (frame, subframe, or alignment issues).

- **Service records** (lack of maintenance history is a red flag).

10. **Competitor Alternatives May Be More Reliable**

Brands like **Lexus (RX 350), BMW (X5), or Audi (Q5)** often have **better long-term reliability ratings** and lower maintenance costs, though they may lack Mercedes prestige.

---

### **Ending Conclusion**

The **2012 Mercedes-Benz R350 3.0L AWD (400-62112)** is a **solid mid-range luxury SUV** that offers a **good balance of power, comfort, and AWD capability**. It is well-suited for **drivers who prioritize luxury, prestige, and all-weather capability** while being willing to accept **higher maintenance costs**.

However, **buyers should be prepared for potential transmission issues, electrical quirks, and expensive repairs** if the vehicle lacks proper maintenance history. A **thorough pre-purchase inspection (PPI) is essential** to avoid costly surprises.

If you **value reliability over brand prestige**, alternatives like the **Lexus RX 350 or BMW X5** may be more cost-effective in the long run. But if you **love Mercedes-Benz and can afford the maintenance**, the R350 is a **capable and comfortable choice** for daily driving and light adventure.

---

### **Recommendation**

You **prioritize luxury and AWD** over absolute reliability.

You **have a budget for maintenance** and can afford potential repairs.

You **find a well-documented vehicle** with **full service records**, especially for timing belt, transmission, and suspension.

You **plan to keep it for 5-7 years** and can handle higher insurance costs.

You **cannot afford Mercedes maintenance costs** (expect **$1,000 $3,000 per year** in upkeep).

The **transmission or electrical systems show signs of neglect** (rough shifting, warning lights, or no service history).

You **prefer a more reliable brand** (Lexus, BMW, or Audi may be better long-term investments).

You **live in an area with extreme weather** (salt corrosion can accelerate rust and suspension wear).

- **Get a PPI** from a **Mercedes specialist** to check for hidden issues.

- **Negotiate based on mileage and service history** aim for **under 100,000 miles** if possible.

- **Budget for immediate repairs** (timing belt, fluid changes, tire/wheel alignment).

- **Consider a certified pre-owned (CPO) model** if available, as it often comes with a warranty.

If you proceed carefully, the R350 can be a **rewarding luxury SUV** just be prepared for the **higher cost of ownership**.

Details:

Donor Vehicle model: R350 Year: 2012 Mileage: 149000 not available or unknown Stock Number: EET1 Notes: 3.0TD,AT,AWD, This Transmission May Have 2 Different Fill Locations / Points and Require Fluids. Labor and costs associated with part installation are not covered under warranty.

part #: r350 prices

• $1275.94-$1649.99

specifications autotransmissionsgo:

• for models: R350, Awd
• for makes: Mercedes
• for years: 2012
• mpn: R350
• conditions options: At, Awd
• genuine oem: Yes
• make: Mercedes-benz
• type: Automatic Transmission
• ipn: 400-62112
• manufacturer warranty: 60 Day

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• wallet: Apple-pay
• credit card: Mastercard
• other

shipping autotransmissionsgo:

• cost: $0.00
• type: Fixed
• class: Freight
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offer autotransmissionsgo:

• options: Ship-to-home
• sold: 0
• availability: In Stock
• best offers: True
• started: June 9, 2026
• quantity: 1

general autotransmissionsgo:

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

seller autotransmissionsgo:

• city: Spokane, Washington
• rating: 99.9%
• # reviews: 52281

returns autotransmissionsgo:

• paid by: Buyer
• time: 60 Days
• policy: Returns Accepted

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