MERCEDES A1639100323 Seat Rail Track Base Front Left Driver Benz

( Manufacturer Part Number: A1639100323 ), ( Part Type: Seat Driver Motor ), ( Manufacturer Warranty: 60 Day ), ( Country Of Origin: Germany )

Review MERCEDES benz Seat Rail Track Base Motors Front Left Driver Oem fits W163 ML500 2000–2005

The **Mercedes-Benz A1639100323 W163 ML500 Seat Rail Track Base (Front Left, Driver Side) for model years 2000 2005** is a precision-engineered component designed to ensure optimal seating comfort, structural integrity, and long-term durability in the iconic Mercedes-Benz ML-Class SUV. Part of the ML500 s luxurious and performance-oriented chassis system, this seat rail track base serves as a critical load-bearing element, anchoring the front driver s seat to the vehicle s underbody while accommodating the dynamic forces of acceleration, braking, and cornering. Crafted from high-grade, heat-treated steel, this component is engineered to withstand repeated stress cycles without deformation, maintaining alignment and stability even under the weight of the driver and passenger. Its robust construction also contributes to the ML500 s signature blend of refinement and off-road capability, allowing for smooth transitions between on-road luxury and rugged terrain.

The **A1639100323** is a direct-fit replacement for the original equipment part, meticulously designed to match the exact dimensions, mounting points, and tolerances of the factory component, ensuring a seamless integration with the ML500 s seat track system. Its contoured base features precise cutouts and alignment guides that align perfectly with the vehicle s seat rails, preventing lateral play and ensuring consistent seating position critical for both driver ergonomics and the proper function of the seat s reclining and height-adjustment mechanisms. This component is particularly vital for maintaining the integrity of the seat s electrical connections, as it houses the wiring harness for the seat s power functions, including lumbar support and memory settings, which are hallmarks of the ML500 s premium interior.

For restoration or maintenance projects, this seat rail track base is an essential upgrade for owners seeking to restore their ML500 to factory specifications or enhance its structural reliability. Its compatibility extends beyond basic seat replacements, making it a valuable addition for customization projects where seat height, angle, or material changes are implemented. Whether installed as part of a full seat refurbishment or as a standalone repair to address wear and tear, this part ensures that the driver s seating experience remains aligned with Mercedes-Benz s commitment to precision engineering and driver-centric design. Proper installation requires adherence to the vehicle s service manual to guarantee correct torque specifications and alignment, as even minor misalignments can affect ride quality or seat functionality over time.

### **Analysis of Buying a Mercedes-Benz A1639100323 (W163 ML500, Seat Rail Track Base, Front Left Driver, 00-05)**

#### **Pros**

1. **Rarity and Collectibility**

- The ML500 (W163) is a limited-production luxury SUV, particularly the 5.4L V8 model. The seat rail track base suggests it may have been a prototype or a special build, making it highly sought after by collectors. Original, low-mileage examples are increasingly difficult to find, increasing its long-term value.

2. **Performance and Power**

- The 5.4L V8 engine (M177) produces **408 hp and 409 lb-ft of torque**, delivering strong acceleration and towing capability (up to 7,700 lbs). This makes it a capable off-road and highway performer, especially for its era.

3. **Luxury and Build Quality**

- Mercedes-Benz s W163 generation (2000 2005) is known for its premium interior, high-quality materials, and refined ride. The ML500 was the flagship model, offering top-tier features like leather-trimmed seats, wood/aluminum accents, and advanced electronics (e.g., COMAND system in later years).

4. **Potential for Restoration or Modification**

- If the vehicle is in need of restoration, the parts market for W163 models is still active, though some specialized components (e.g., seat rails, track base parts) may be harder to source. A well-restored example could command a premium.

5. **Historical Significance**

- The ML500 was one of the first luxury SUVs to blend off-road capability with high-end luxury. Owning one connects you to a niche but influential segment of automotive history.

---

#### **Cons**

1. **High Maintenance and Repair Costs**

- The 5.4L V8 is a complex engine with potential issues like **oil leaks, timing chain wear, and fuel system problems** (especially in later years). The W163 s suspension and drivetrain (4Matic in some cases) also require specialized knowledge to maintain.

- Labor costs for Mercedes-Benz are among the highest in the industry, and parts can be expensive, even for used vehicles.

2. **Fuel Efficiency and Environmental Concerns**

- The ML500 s V8 engine averages **12 14 MPG combined**, making it inefficient by modern standards. Gas prices and environmental regulations could impact long-term ownership costs.

3. **Parts Availability and Scarcity**

- While the W163 is not extinct, many original parts (especially for less common variants like this seat rail track base) may be discontinued. Salvage yards and aftermarket suppliers are limited, increasing repair risks.

- The "track base" modification suggests it may have been built for performance or testing, which could mean unusual or hard-to-find components.

4. **Depreciation and Market Value**

- While the ML500 holds value better than most SUVs, it is not a high-volume car. The market for 00 05 models is niche, and finding buyers (especially for a specialized build) could be challenging. If you plan to sell later, you may not recoup the full purchase price.

5. **Reliability Concerns**

- The W163 generation has a reputation for **electrical gremlins, transmission issues (especially in 4Matic models), and suspension wear**. A thorough pre-purchase inspection is critical to avoid hidden problems.

- The seat rail track base modification might indicate prior off-road use, which could have accelerated wear on suspension, drivetrain, or bodywork.

6. **Insurance and Registration Costs**

- Luxury SUVs like the ML500 often have higher insurance premiums due to repair costs. Some insurers may also charge more for specialized or high-value vehicles.

7. **Driving Experience Limitations**

- While the ML500 is comfortable, its size and weight make it less nimble than modern SUVs. The V8 s torque can be overwhelming in city driving, and fuel economy is a constant compromise.

---

### **Key Considerations Before Purchase**

1. **Verify the Vehicle s History**

- Confirm the **mileage, service records, and accident history**. A clean title and maintenance logs are essential.

- Ask about the **purpose of the seat rail track base** was it for testing, racing, or off-roading? This could affect long-term reliability.

2. **Budget for Hidden Costs**

- **Engine and transmission service** (oil changes, timing chain inspection).

- **Suspension and drivetrain checks** (ball joints, bushings, differentials).

- **Electrical system diagnostics** (common in Mercedes).

- **Potential bodywork repairs** (rust, alignment issues).

3. **Test Drive Thoroughly**

- Listen for **unusual noises** (knocking, whining, or hydraulic whining from the power steering).

- Check for **smooth shifting** (if automatic) and **proper torque steer** (common in V8 AWD vehicles).

- Test **braking and handling** W163 models can be heavy and slow to respond.

4. **Consider a Mechanic s Inspection**

- **Engine compression and oil condition**.

- **Transmission fluid and filter**.

- **Suspension components and alignment**.

- **Electrical system (COMAND, sensors, etc.)**.

5. **Alternative Options**

- A **less modified ML500** (standard suspension) with lower miles.

- A **different Mercedes model** (e.g., W204 E500, W211 CLS55) if you want luxury without the V8 s complexity.

- A **modern luxury SUV** (e.g., BMW X5, Audi Q7) if reliability and fuel efficiency are priorities.

---

### **Conclusion and Recommendation**

- You are a **collector or enthusiast** who values rarity and historical significance over practicality.

- You have **deep pockets** and are prepared for **high maintenance costs**.

- You plan to **restore or modify** the vehicle and are willing to invest time in sourcing parts.

- You have **access to a trusted Mercedes specialist** for ongoing maintenance.

- The price is **competitive** (e.g., well below $20,000 for a low-mileage example with clean history).

- You need a **daily driver** with low running costs modern SUVs will be more practical.

- You are **unprepared for unexpected repairs** or lack access to Mercedes expertise.

- The vehicle has **high miles, poor service history, or obvious mechanical issues**.

- You are buying primarily for **resale value** the niche market may not support a quick or profitable sale.

This **A1639100323 ML500 with seat rail track base** is a **high-risk, high-reward purchase**. It appeals to **purists and collectors** but demands **significant financial and technical commitment**. If you proceed:

- **Get a pre-purchase inspection** from a Mercedes specialist.

- **Negotiate aggressively** the rarity should justify a lower price if the vehicle has flaws.

- **Budget for a full restoration** if you plan to keep it long-term.

- **Consider insurance costs** luxury SUVs are expensive to insure.

For most buyers, a **standard ML500 (W163) with lower miles and no modifications** would be a safer investment. However, if you are passionate about Mercedes history and willing to tackle the challenges, this could be a **unique and rewarding** addition to your collection.

Details:

May 27, 2021 LOC SEAT RAILS 73. Item may show light scuffs, scratches or other imperfections as a result of this being used part. Please Verify Compatibility Before Buying. All the parts are tested either before or after removal from vehicle.

part #: a1639100323 prices

• $149.85-$238.45

specifications seainterio:

• for models: W163, Ml500
• for makes: Mercedes
• for years: 2000-2005
• mpn: A1639100323
• part type: Seat Driver Motor
• manufacturer warranty: 60 Day
• country of origin: Germany

offer seainterio:

• started: March 31, 2026
• availability: In Stock
• quantity: 1
• best offers: True
• sold: 0
• options: Ship-to-home

seller seainterio:

• # reviews: 4253
• rating: 99.6%
• city: Pleasant Grove, California

payments seainterio:

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

general seainterio:

• condition: Used
• Interior Parts Accessories > Seats, Parts Accessories > Seats

shipping seainterio:

• service: Standard
• class: Standard
• transit: 3-9 Days
• cost: $100.00
• type: Fixed

returns seainterio:

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

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