MERCEDES 1726700738 Rear Left Driver Seal Sealing Rail Benz R172

( Manufacturer Part Number: 1726700738 ), ( Part Type: Seal Driver Sealing ), ( Manufacturer Warranty: 1 Month ), ( Placement On Vehicle: Left, Rear )

Review MERCEDES benz Rear Left Driver Side Seal Sealing Rail Oem fits SLK SLC 2012–2020

The **Mercedes-Benz 1726700738 12-20 R172 SLK/SLC Rear Left Driver Seal (Sealing Rail)** is a precision-engineered component designed exclusively for the iconic R172 generation of Mercedes-Benz SLK and SLC roadsters, ensuring optimal sealing and structural integrity within the vehicle s rear body structure. This high-performance sealing rail, crafted from durable, weather-resistant materials, plays a critical role in maintaining the aerodynamic efficiency, waterproofing, and long-term durability of the convertible top mechanism. Positioned along the driver s side rear quarter panel, it interfaces directly with the soft top frame and surrounding body panels, preventing moisture ingress, road debris, and wind noise while the top is retracted or in transit. The seal s robust construction likely featuring a reinforced rubber or elastomeric compound with integrated adhesive bonding ensures a tight, consistent seal against the adjacent metal surfaces, mitigating potential leaks that could compromise the interior s comfort and the convertible s smooth operation. Ideal for both original equipment replacement (OEM) and aftermarket restoration projects, this part adheres to Mercedes-Benz s stringent quality standards, guaranteeing compatibility with the R172 s intricate bodywork, which spans models from the late 1990s through the early 2000s. Whether addressing signs of wear from years of use or proactively reinforcing the seal to extend the convertible s lifespan, this component is essential for preserving the SLK or SLC s signature blend of sporty agility and refined luxury. Proper installation requires meticulous alignment with the sealing surfaces and the use of specialized adhesives or sealants to prevent future detachment, ensuring the seal remains effective under varying environmental conditions and driving stresses.

### **Analysis of Buying a Mercedes-Benz SLK/SLC Rear Left Driver Seal (Part Number: 1726700738, 12-20, R172, SLK/SLC)**

#### **Pros of Purchasing This Part**

1. **OEM Quality and Fit** This is an original Mercedes-Benz part, meaning it is designed to match the exact specifications of the vehicle s manufacturer. It ensures proper sealing, preventing leaks and maintaining cabin comfort.

2. **Reliability and Durability** Mercedes-Benz parts are built to last, reducing the risk of premature failure compared to aftermarket alternatives that may not meet the same standards.

3. **Prevents Water Leaks and Moisture Damage** A failing seal can lead to water ingress, affecting the driver s seat, electronics, and structural integrity. Replacing it proactively avoids costly repairs down the line.

4. **Maintains Resale Value** Keeping the vehicle in top condition with genuine parts helps preserve its resale value, especially for luxury vehicles like the SLK/SLC.

5. **Warranty Coverage** If purchased from an authorized dealer or through Mercedes-Benz s official channels, the part may still qualify for warranty or extended service plans, depending on the vehicle s history.

6. **Compatibility with Other Systems** A properly sealed rail ensures the driver s seat operates smoothly, reducing wear on the seat mechanism and improving long-term functionality.

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#### **Cons of Purchasing This Part**

1. **High Cost** OEM parts from Mercedes-Benz are significantly more expensive than aftermarket alternatives. The price may range from **$150 $300 **, depending on the source and whether labor is included.

2. **Limited Availability Outside Dealers** While the part can be sourced from third-party suppliers (e.g., RockAuto, Amazon, or specialty auto parts stores), authenticity and quality may vary. Purchasing from unauthorized sellers risks receiving a counterfeit or substandard part.

3. **Installation Complexity** Replacing a seal in the SLK/SLC s rear left driver rail requires disassembling parts of the seat and possibly the cabin interior. Unless the buyer is experienced, professional installation is recommended, adding to labor costs.

4. **Potential for Counterfeit Parts** The aftermarket is flooded with knockoff Mercedes-Benz parts. These may not fit correctly, fail quickly, or void warranty coverage if the vehicle is still under factory warranty.

5. **Time-Consuming Replacement** The process involves removing the seat, accessing the rail, and carefully resealing. For non-mechanically inclined owners, this could take several hours or require multiple attempts.

6. **Alternative Solutions May Exist** In some cases, a seal failure can be addressed with sealant (e.g., Permatex or 3M 5200) as a temporary fix, though this is not a permanent solution and may not be as effective as a full replacement.

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### **Conclusion**

The **Mercedes-Benz SLK/SLC rear left driver seal (1726700738)** is a critical component that, when failing, can lead to water leaks, electrical issues, and long-term damage to the vehicle s interior. **Purchasing the OEM part is the most reliable choice** if budget and convenience allow, as it ensures a proper fit, longevity, and compatibility with the vehicle s systems. However, the **high cost and complexity of installation** make it a less ideal option for casual DIYers or those on a tight budget.

For those seeking a **cost-effective alternative**, high-quality aftermarket parts from reputable brands (e.g., Duralast, Fel-Pro, or Genuine OEM reconditioned parts) can offer similar performance at a fraction of the price. **Always verify the part s authenticity** through cross-referencing part numbers and purchasing from trusted suppliers. If unsure about installation, consulting a Mercedes-Benz specialist is advisable to avoid further damage.

### **Recommendation**

- **If budget is not a concern and the vehicle is still under warranty or you want the best long-term solution**, purchase the **OEM part (1726700738) from an authorized Mercedes-Benz dealer or approved supplier** (e.g., MBOL, MB Parts Store). Ensure professional installation to maintain warranty coverage.

- **If cost is a priority**, opt for a **high-quality aftermarket seal** (e.g., from **Fel-Pro or Duralast**) and proceed with installation only if comfortable with the process. Test the seal thoroughly after replacement to confirm it resolves the issue.

- **If the seal is minorly damaged**, consider a **temporary fix with sealant** (e.g., **3M 5200**) as a short-term solution while budgeting for a permanent replacement.

- **Always check the vehicle s service history** if the seal was previously replaced, the issue may stem from improper installation or another underlying problem (e.g., a cracked rail).

**Final Verdict:** The OEM part is the **best choice for reliability**, but aftermarket options can be viable if sourced carefully. Prioritize **authenticity, proper installation, and testing** to ensure the problem is resolved effectively.

Details:

Shipping cost or carrier may change, based on final destination. Keywords for search: SLK250 SLK350 SLK55 AMG R172. WOW Automotive Alt Design OEM premium used parts Same day shipping Verified Fit No type: Part No: condition: Used Good/Normal use see photos Quick fit summary: Mercedes-Benz SLC300 Base Convertible 2-Door 2017 - 2020 ; Final Edition 2020 ; SLC43 AMG SLK300 2016 ; SLK350 2012 - 2016 ; SLK55 SLK250 2012 2015 Manufacturer Numbers, / A, Shipping We typically ship parcels within 24 hours. Item Condition.

Bentley Corvette Porsche Aston Martin Maserati Mercedes BMW Jaguar Land Rover. Range Rover Sport SC LR4 L320. All parts are tested either before or after removal from the vehicle. Safe Packing Global shipping.

Item may show light scuffs, scratches or other imperfections as a used part. Contact: Questions.

part #: 1726700738 prices

• $59.49-$159.99

specifications vintagwinde:

• for models: Slk, Slc
• for makes: Mercedes
• for years: 2012-2020
• mpn: 1726700738
• part type: Seal Driver Sealing
• manufacturer warranty: 1 Month
• placement on vehicle: Left, Rear

general vintagwinde:

• condition: Used
• Exterior Parts Accessories > Glass Window Parts > Window Seals, Gaskets Trims

payments vintagwinde:

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

seller vintagwinde:

• rating: 99.9%
• # reviews: 4743
• city: Dallas, Texas

offer vintagwinde:

• started: May 13, 2026
• sold: 0
• options: Ship-to-home
• availability: In Stock
• quantity: 1

returns vintagwinde:

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

shipping vintagwinde:

• transit: 3-6 Days
• type: Fixed
• cost: $0.00
• service: Standard
• class: Standard

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