MERCEDES A1662706801 Automatic Transmission A166270780180 Benz 3.0L

( Manufacturer Part Number: A1662706801 ), ( Items Included: As Shown ), ( Vintage Part: No ), ( Type: Automatic Transmission ), ( Oe/oem Part Number: A166270780180, 1662707801 / 166270780180 / 166 270 78 01 80 ), ( Manufacturer Warranty: 1 Month ), ( Country Of Origin: Germany )

Review MERCEDES benz 3.0l Automatic Transmission Assembly fits CLS400 E400 GLE450 AWD 2017–2019

The **Mercedes-Benz A1662706801 (2017-2019 CLS 400 E400 GLE 450 AWD 3.0L Automatic Transmission)** represents the pinnacle of refined luxury, engineering precision, and dynamic performance within the iconic CLS coupe-sedan hybrid lineup. Engineered for those who demand both sophistication and exhilaration, this model seamlessly blends the timeless elegance of Mercedes-Benz design with cutting-edge technology and a powerplant that delivers effortless yet thrilling acceleration. At its heart lies the **3.0-liter inline-six turbocharged engine**, producing a robust **302 horsepower** in the CLS 400 and **367 horsepower** in the GLE 450 (with the optional **3.0-liter twin-turbo V6** in the E400), paired with an **8-speed automatic transmission** that ensures smooth, responsive shifts even under spirited driving conditions. For those seeking uncompromising capability, the **all-wheel-drive (AWD) system** distributes torque intelligently, enhancing traction and stability without sacrificing the car s agile handling ideal for both city maneuverability and spirited highway overtakes.

The exterior design of the CLS exudes a bold yet understated presence, with its **sharp, angular headlamps**, **sleek LED taillights**, and **aerodynamic contours** that reduce drag while maintaining a commanding road presence. The **19-inch alloy wheels** (standard on higher trims) are finished in polished chrome or matte black, complementing the **premium materials** found throughout the cabin, including **Nappa leather upholstery**, **aluminum trim accents**, and **ambient lighting** that adjusts to the driver s preferences. The **360-degree camera system** and **parking sensors** further enhance convenience, while the **adaptive dampers** and **electronic stability control** ensure a composed ride over uneven surfaces or during high-speed maneuvers.

Inside, the CLS is a sanctuary of luxury and innovation, featuring Mercedes-Benz s **MBUX infotainment system** (on later models) or the **COMAND system** (on earlier versions), complete with a **12.3-inch touchscreen**, **Apple CarPlay**, **Android Auto**, and **Bluetooth connectivity**. The **12-speaker Burmester audio system** (standard on higher trims) delivers immersive sound quality, while the **ventilated and heated front seats**, **massage function**, and **climate-controlled rear seats** ensure comfort for both driver and passengers. The **steering wheel with integrated controls**, **adaptive cruise control**, and **lane-keeping assist** reflect Mercedes-Benz s commitment to driver assistance, making long drives effortless and engaging.

Under the hood, the **3.0-liter turbocharged engine** (M256 in the CLS 400 and M256DE in the E400) is paired with the **7G-Tronic 8-speed automatic transmission**, which features **stepless gear ratios** and **quick-shifting capabilities** for near-instantaneous acceleration. The **AWD system** (standard on the GLE 450) ensures balanced power delivery, while the **sport-tuned suspension** and **electronic differential lock** (optional) allow for a more dynamic driving experience. Whether cruising at highway speeds or navigating tight city streets, the CLS offers a harmonious blend of power, precision, and comfort.

For those who appreciate exclusivity, the **GLE 450 AWD** trim elevates the experience with **unique exterior styling cues**, including **distinctive front and rear fascias**, **19-inch or 20-inch alloy wheels**, and **premium interior upgrades** such as **wood or carbon fiber trim**. The **Mercedes-Benz Security System** with **immobilizer and alarm** ensures peace of mind, while the **remote start and keyless entry** add modern convenience. Whether parked in a high-end garage or cruising along a scenic coastal road, this model embodies the essence of Mercedes-Benz where luxury, performance, and innovation converge to create an unforgettable driving experience.

### Pros and Cons of Buying a 2017 2019 Mercedes-Benz CLS 400 (A1662706801), GLE 450 AWD, or GLE 450 3.0L Automatic

---

#### **Pros**

1. **Premium Build Quality and Comfort**

Mercedes-Benz vehicles are known for their high-quality materials, refined interiors, and smooth ride. The CLS 400 and GLE 450 models feature spacious, well-crafted cabins with premium leather upholstery, ambient lighting, and advanced climate control systems. The suspension tuning provides a balanced blend of comfort and sportiness, making long drives enjoyable.

2. **Strong Engine Performance**

The 3.0L V6 biturbo engine (M256) in these models delivers **367 382 horsepower** and **369 413 lb-ft of torque**, depending on the variant (CLS 400: 367 HP, GLE 450: 382 HP). This engine is reliable for its class, offering strong acceleration and a smooth power delivery. The AWD system (in GLE 450) improves traction in adverse conditions.

3. **Advanced Safety Features**

These models come equipped with Mercedes **DISTRONIC PLUS adaptive cruise control**, **active lane-keeping assist**, **blind-spot monitoring**, **pre-collision braking**, and **night vision assist** (in higher trims). The **MBUX infotainment system** (in newer 2019 models) integrates voice control, augmented reality navigation, and wireless Apple CarPlay/Android Auto.

4. **Luxury and Technology**

The interior is packed with luxury features such as **massage seats**, **ventilated/heated/cooled leather**, **head-up display**, **12-speaker Burmester audio system**, and **ambient lighting**. The **MBUX infotainment** (2019 models) is one of the most advanced in the industry, offering a futuristic touchscreen interface with AI assistance.

5. **Resale Value**

Mercedes-Benz retains strong resale value compared to many competitors. The CLS and GLE models, in particular, hold their value well due to their luxury status and demand in the used market.

6. **Reliability (Compared to Competitors)**

While no luxury car is immune to issues, the **3.0L V6 biturbo engine** in these models is generally reliable if maintained properly. Common problems (e.g., turbocharger failures, oil leaks) are manageable with regular servicing. The **automatic transmission (7G-Tronic)** is robust but requires proper fluid changes.

7. **Versatility of Body Styles**

- The **CLS 400** offers a **coupe/sedan hybrid** design with a sportier stance and rear-wheel-drive option (or AWD in some markets).

- The **GLE 450** is a **luxury SUV** with higher ground clearance, better off-road capability (via AWD), and more cargo space.

8. **Dealer Support and Warranty**

Mercedes-Benz dealers provide extensive service networks, and these models may still have **remaining factory warranties** (e.g., powertrain coverage extending into 2020s). Extended warranties are often available for purchase.

---

#### **Cons**

1. **Higher Maintenance and Repair Costs**

Mercedes-Benz parts and labor are **significantly more expensive** than mainstream brands. Common issues like **turbocharger failures, oil leaks, or electrical gremlins** can be costly to fix. Budget **$1,500 $3,000 annually** for maintenance beyond basic services.

2. **Potential Engine and Transmission Issues**

- The **3.0L V6 biturbo engine** is prone to **turbocharger failures** (especially if oil changes were neglected). Symptoms include **whining noises, loss of power, or smoke from the exhaust**.

- The **7G-Tronic automatic transmission** can develop **rough shifting or delayed engagement** if not serviced properly. Some owners report **transmission fluid leaks**.

- **Oil leaks** from the **valve cover gasket, oil filter housing, or oil pan gasket** are common and require attention.

3. **Electrical and Infotainment Problems**

- The **MBUX infotainment system** (2019 models) can be **glitchy or slow**, with reports of **touchscreen unresponsiveness** or **software bugs**.

- **Sensor failures** (e.g., rain sensors, parking sensors) are occasional issues.

- **Power window or door lock malfunctions** are not uncommon.

4. **Fuel Efficiency is Average for the Class**

- **CLS 400 (RWD):** 18 20 MPG city / 26 28 MPG highway

- **GLE 450 (AWD):** 17 19 MPG city / 24 26 MPG highway

This is **below luxury SUVs with diesel engines** (e.g., BMW X5d) but acceptable for a V6 AWD luxury car.

5. **Depreciation Remains a Concern**

While Mercedes holds value better than some brands, luxury cars still **lose 20 30% of their value in 3 5 years**. If you plan to keep it long-term, this is less of an issue.

6. **Noise and Wind Noise**

Some owners report **excessive wind noise at highway speeds**, particularly in the CLS coupe. The **rear seats** in the GLE 450 can also be **noisy** due to the open-air design.

7. **Complexity of Ownership**

Mercedes vehicles require **more specialized knowledge** to maintain. Finding a **trusted Mercedes dealer or independent specialist** is crucial to avoid scams or poor repairs.

8. **Potential for Hidden Damage**

- **Accident history** (use Carfax/AutoCheck).

- **Service records** (proper oil changes, turbo maintenance).

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

- **Electrical gremlins** (test all sensors, windows, locks).

---

### **Ending Conclusion**

The **2017 2019 Mercedes-Benz CLS 400, GLE 450 AWD, and GLE 450 3.0L** are **excellent choices for buyers seeking a premium, comfortable, and capable luxury vehicle**. The **V6 biturbo engine, advanced safety tech, and refined interiors** make them stand out in their class. However, **higher maintenance costs, potential engine/transmission issues, and electrical quirks** require careful consideration.

- **Prioritize luxury, comfort, and driving dynamics** over cost of ownership,

- **Have a budget for maintenance ($2,000 $4,000/year beyond basic services),**

- **Find a well-maintained example with full service history,**

- **Are okay with potential turbo or transmission concerns (if addressed early),**

then these models are **strong contenders**.

- **Are sensitive to high repair costs,**

- **Want better fuel efficiency or lower long-term ownership expenses,**

- **Prefer a more reliable brand with fewer known issues,**

- **Cannot afford unexpected mechanical failures,**

consider alternatives like a **BMW 5 Series, Audi A6, or Lexus GS**, which may offer similar luxury with slightly better reliability.

---

### **Recommendation**

You **inspect thoroughly** (mechanical, electrical, service records).

You **budget for maintenance** and have a **trusted mechanic**.

You **prioritize luxury and driving experience** over cost efficiency.

You **choose a GLE 450 over CLS 400** if you need more space/versatility.

You **cannot afford unexpected repairs** (turbo, transmission, electrical).

You **find no service history** or signs of neglect.

You **prefer a more reliable brand** with lower long-term costs.

These Mercedes models are **excellent used luxury purchases for the right buyer** one who values **premium comfort, performance, and technology** and is prepared for **higher ownership costs**. With proper care, they can provide **many years of enjoyable driving**.

Details:

These numbers on photos must match in order to work with your vehicle. However it does not guarantee fitment. All connectors, Part Number etc. Scratches, surface imperfections, scuffs, dust, dirt/oxidized surface/some rust on the back/oil residue.

All electric parts have been tested and work well. Parts are marked in case of return to ensure all original parts on the item and was not tampered with.

part #: a1662706801 prices

• $600.00-$1308.99

specifications autotransmissionsgo:

• for models: Cls400, E400, Gle450, Awd
• for makes: Mercedes
• for years: 2017-2019
• mpn: A1662706801
• items included: As Shown
• vintage part: No
• type: Automatic Transmission
• oe/oem part number: A166270780180, 1662707801 / 166270780180 / 166 270 78 01 80
• manufacturer warranty: 1 Month
• country of origin: Germany

returns autotransmissionsgo:

• policy: No Returns

payments autotransmissionsgo:

• wallet: Paypal
• credit card: Mastercard
• other

general autotransmissionsgo:

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

offer autotransmissionsgo:

• availability: In Stock
• started: March 19, 2026
• quantity: 1
• sold: 0
• options: Seller-arranged-local-pickup

seller autotransmissionsgo:

• city: Bensalem, Pennsylvania
• # reviews: 602
• rating: 98.9%

shipping autotransmissionsgo:

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