MERCEDES 1664407834 Electric Power Rack Pinion Benz X166

( Manufacturer Part Number: 1664407834 ), ( Part Type: Pinion Rack ), ( Manufacturer Warranty: 1 Month ), ( Country Of Origin: Germany )

Review MERCEDES benz Electric Power Rack And Pinion Oem fits W166 GL450 ML550 AWD 2013–2016

The **Mercedes-Benz 1664407834 (13-16" x 166mm W166 GL450/ML550 AWD Electric Power Rack & Pinion)** is a high-performance, precision-engineered steering system designed exclusively for the iconic **W166 generation of Mercedes-Benz GL-Class (G550/G63 AMG) and ML-Class (ML550 AMG) vehicles**, manufactured between 2006 and 2011. This electric power-assisted rack and pinion assembly represents the pinnacle of Mercedes-Benz engineering, combining durability, responsiveness, and seamless integration with the vehicle s advanced AWD (All-Wheel Drive) system. Built to exacting specifications, this steering system features a **13-16" (330-406mm) track width**, accommodating the wide stance and aggressive styling of these luxury SUVs, while the **166mm (6.54") rack length** ensures optimal steering geometry for both on-road precision and off-road maneuverability. The **electric power assist module** delivers instant, torque-sensitive feedback, enhancing driver engagement without compromising the natural feel of the vehicle s steering. This system is engineered to work in tandem with the **AWD architecture**, providing balanced power distribution and responsive handling whether navigating tight city streets, winding mountain roads, or off-road trails. Constructed from high-grade materials, including **galvanized steel and corrosion-resistant coatings**, this rack and pinion is built to withstand the rigors of daily driving, extreme weather conditions, and heavy-duty use, making it an ideal upgrade for enthusiasts seeking to restore or enhance the performance of their W166 GL450 or ML550. Whether replacing a worn-out original component or upgrading for improved steering feel and reliability, this Mercedes-Benz part ensures a perfect fit, maintaining the vehicle s legendary blend of luxury and performance.

### **Pros and Cons of Buying a Mercedes-Benz W166 GL450/ML550 (2013 2016) with Electric Power Rack & Pinion Steering**

#### **Overview**

The Mercedes-Benz W166 platform includes the **GL450 (V8) and ML550 (V8 AWD)**, both of which are well-regarded luxury SUVs from the mid-2010s. The **electric power rack-and-pinion steering** is a modern refinement over older hydraulic systems, offering smoother, more precise feedback. Below is a detailed breakdown of the key advantages and disadvantages of purchasing one of these models.

---

### **Pros**

1. **Strong Engine and Performance**

- The **5.5L V8 (ML550) and 5.0L V8 (GL450)** produce **382 429 hp and 420 469 lb-ft of torque**, delivering strong acceleration and towing capacity (up to **7,700 lbs** with the ML550).

- The **AWD system (ML550)** provides excellent traction in adverse conditions, making it a capable off-road and winter-weather SUV.

- Smooth power delivery with **7-speed automatic transmission** (7G-Tronic) and **adaptive damping** for a refined ride.

2. **Luxury and Comfort**

- **Premium interior** with high-quality materials, ambient lighting, and **Mercedes signature ergonomics**.

- **Comfortable seating** with **heated/ventilated seats** (optional), **massage functions**, and **adaptive suspension** for a smooth ride.

- **Quiet cabin** due to excellent sound insulation and powerful engine noise suppression.

3. **Electric Power Rack & Pinion Steering**

- **More precise and responsive** than hydraulic steering, with **adjustable steering feel** (via "Steering Feel" setting).

- **Reduced effort** at low speeds (easier parking) while maintaining **feedback at highway speeds**.

- **No hydraulic fluid leaks** (a common issue in older hydraulic systems).

4. **Reliability and Build Quality**

- The **W166 platform** is known for **durability**, with a **strong chassis** and **high-quality components**.

- **Fewer common failure points** compared to earlier Mercedes models (e.g., no known major issues with the **electric steering system** in this generation).

- **Proven V8 engines** (5.0L and 5.5L) with **high mileage potential** if maintained properly.

5. **Safety Features**

- **Standard stability control, traction control, and multiple airbags**.

- **Available advanced safety tech** (e.g., **Active Body Control, Blind Spot Assist, Pre-Safe**).

- **Strong crash structure** with **Euro NCAP-compliant safety ratings**.

6. **Resale Value and Prestige**

- Mercedes-Benz retains **strong resale value** for luxury SUVs, especially well-maintained examples.

- **Brand prestige** carries weight in the used market, making it easier to sell later.

7. **Off-Road and Towing Capability (ML550)**

- **AWD system** with **adaptive differentials** improves off-road performance.

- **Up to 7,700 lbs towing capacity** (with trailer brake controller) makes it suitable for heavy loads.

- **Optional 4WD system** (if equipped) enhances capability in rough terrain.

8. **Tech and Infotainment (for the era)**

- **MBUX (early version) or COMAND APS** with **Bluetooth, USB, and satellite radio**.

- **Available navigation, parking sensors, and rearview camera**.

- **Wireless charging** (on later models) and **ambient lighting** for a premium feel.

---

### **Cons**

1. **High Maintenance Costs**

- **Mercedes-Benz is expensive to repair**, with **labor costs often 2 3x higher** than average.

- **Transmission (7G-Tronic)** Some reports of **slipping or delayed shifts** (though rare in this generation).

- **Suspension components** (shocks, struts, bushings) wear out around **80,000 100,000 miles**.

- **Brake system** (high-performance pads and rotors degrade faster).

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

2. **Fuel Economy is Poor**

- **GL450 (5.0L V8):** 14 16 MPG city / 18 20 MPG highway.

- **ML550 (5.5L V8 AWD):** 12 14 MPG city / 16 18 MPG highway.

- **High fuel consumption** adds to long-term ownership costs.

3. **Depreciation**

- While Mercedes retains value, **luxury SUVs depreciate faster** than sedans or smaller SUVs.

- **Electric steering systems** (though reliable) may require **specialized mechanics**, increasing long-term costs.

4. **Size and Maneuverability**

- **Large dimensions** (19.5 ft long) make parking and city driving **less convenient** than smaller SUVs.

- **Low ground clearance** ( 6.7 in) limits off-road capability unless equipped with **optional lift kits**.

5. **Potential Electrical Issues**

- **Infotainment system** (COMAND APS) can be **glitchy or slow** compared to modern standards.

- **Sensor failures** (e.g., **parking sensors, rain sensors**) may require **expensive replacements**.

- **Electric power steering** (while reliable) can be **more complex to diagnose** than hydraulic systems.

6. **Noise and Vibration at High Speeds**

- **Wind noise** can be noticeable at highway speeds.

- **Road noise** may be more pronounced than in newer models with better sound insulation.

7. **Discontinued Parts and Scarcity**

- As these models age, **original parts become harder to find**, increasing repair costs.

- **Aftermarket parts** may not always match OEM quality.

8. **Fuel Costs and Environmental Impact**

- **V8 engines are inefficient** and contribute to **higher running costs** compared to modern hybrids or turbodiesels.

- **Not ideal for eco-conscious buyers** due to **poor MPG and emissions**.

---

### **Conclusion**

The **Mercedes-Benz W166 GL450/ML550 (2013 2016) with electric power rack-and-pinion steering** is a **well-built, powerful, and comfortable luxury SUV** that excels in **performance, towing, and long-term durability** if properly maintained. The **electric steering system** is a **major upgrade** over older hydraulic setups, offering **smoother, more responsive handling**.

However, **high maintenance costs, poor fuel economy, and depreciation** are significant drawbacks. Buyers should **budget for regular servicing** (especially **transmission, suspension, and brakes**) and be prepared for **expensive repairs** if issues arise.

- **Buyers who prioritize luxury, power, and towing capability** over fuel efficiency.

- **Those who can afford Mercedes maintenance costs** and want a **reliable, high-end SUV**.

- **People who value Mercedes brand prestige** and don t mind a **larger, less maneuverable vehicle**.

- **Budget-conscious buyers** (high running costs).

- **City drivers** who need **easy parking and low maintenance**.

- **Eco-friendly buyers** (poor MPG, high emissions).

- **Those who dislike complex electronics** (infotainment, sensors).

---

### **Final Recommendation**

If you **find a well-maintained example with full service history**, the **W166 GL450/ML550 is a fantastic luxury SUV** that will last **200,000 miles with proper care**. However, **only consider it if you can afford the long-term costs** both in **fuel and repairs**.

- If **fuel efficiency is a priority**, look at a **BMW X5 (N55/N63) or Audi Q7 (3.0T V6)**.

- If **lower maintenance costs** are needed, consider a **used Lexus GX or Toyota Land Cruiser**.

- If **electric steering is a must**, newer Mercedes models (e.g., **GLE 350e, GLC 350**) offer **hybrid efficiency** while retaining luxury.

You **need a powerful, towing-capable luxury SUV**.

You **can afford Mercedes maintenance**.

You **find a clean, well-documented example**.

Otherwise, **look for alternatives** that balance **luxury, efficiency, and affordability**.

Details:

Shipping costs are only covered on a case-by-case basis.

part #: 1664407834 prices

• $509.99-$594.89

specifications steragebo:

• for models: W166, Gl450, Ml550, Awd
• for makes: Mercedes
• for years: 2013-2016
• mpn: 1664407834
• part type: Pinion Rack
• manufacturer warranty: 1 Month
• country of origin: Germany

offer steragebo:

• quantity: 1
• best offers: True
• availability: In Stock
• sold: 0
• started: March 27, 2026
• options: Ship-to-home

general steragebo:

• Car Truck Parts Accessories > Steering Suspension > Gearboxes, Rack Pinions
• condition: Used

payments steragebo:

• credit card: Diners-club
• other
• wallet: Paypal

shipping steragebo:

• cost: $80.00
• class: Standard
• service: Standard
• type: Fixed
• transit: 3-6 Days

returns steragebo:

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

seller steragebo:

• city: Dallas, Texas
• # reviews: 1355
• rating: 99.9%

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