MERCEDES 1647800340 Sunroof Rubber Gasket Benz 1647800440

( Manufacturer Part Number: 1647800340 ), ( Type: Gasket ), ( Oe/oem Part Number: Side Opening Vent Left Right ), ( Color: Black ), ( Material: Rubber ), ( Placement On Vehicle: Upper ), ( Country Of Origin: Germany )

Review MERCEDES benz Sunroof Rubber Gasket fits W164 ML350 ML500 2005–2011

The **Mercedes-Benz 1647800340 Sunroof Rubber Gasket** and its companion part **1647800440** are precision-engineered components designed exclusively for the **W164 ML-Class (ML350 and ML500)** models produced between **2005 and 2011**. These gaskets form a critical seal between the sunroof s glass panel and the vehicle s roof structure, ensuring optimal weatherproofing, noise reduction, and structural integrity while the sunroof is in use. Crafted from high-quality, durable rubber compounds, these gaskets are engineered to withstand the rigors of daily driving, including exposure to UV radiation, temperature fluctuations, and the constant flexing associated with opening and closing the sunroof mechanism. The **1647800340** is the primary gasket that fits directly around the perimeter of the sunroof glass, while the **1647800440** serves as an auxiliary seal, often positioned along the sunroof s track or frame to prevent water ingress and drafts. Both components are meticulously molded to match the exact contours of the ML350 and ML500 s sunroof assembly, providing a snug, airtight fit that minimizes leaks and maintains cabin comfort. Their robust construction also helps dampen road noise and vibrations, contributing to a quieter, more refined driving experience. Whether replacing a worn or damaged gasket due to aging, improper installation, or environmental wear, these OEM-quality parts ensure a seamless, factory-like seal that aligns with Mercedes-Benz s high standards for performance and durability. Proper installation requires careful alignment with the sunroof s frame and the use of the appropriate adhesive or sealant to guarantee long-term effectiveness.

### Pros and Cons of purchasing a Mercedes-Benz Sunroof Rubber Gasket (Part Numbers: 1647800340, 1647800440 for W164 ML350/ML500, 2005 2011)

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### **Pros**

1. **Direct Fit and Compatibility**

The gasket is specifically designed for the W164 ML350 and ML500 models produced between 2005 and 2011. This ensures a proper seal, reducing the risk of leaks or improper installation. Using an OEM or high-quality aftermarket part minimizes the chance of compatibility issues.

2. **Improved Weather Sealing**

A faulty or worn sunroof gasket can lead to water leaks, condensation, or drafts, compromising the interior comfort and potentially damaging electrical components or upholstery. Replacing it restores the sunroof s ability to block rain, snow, and wind effectively.

3. **Prevents Long-Term Damage**

Prolonged exposure to moisture can corrode sunroof mechanisms, rust the frame, or cause mold/mildew growth inside the cabin. Addressing the gasket early avoids costly repairs to the sunroof motor, tracks, or roof panels later.

4. **Enhanced Sunroof Functionality**

A well-sealed gasket ensures smooth operation of the sunroof, reducing squeaks, rattles, or resistance when opening/closing. This improves the overall driving experience and extends the lifespan of the sunroof system.

5. **Aesthetic and Resale Value**

A clean, functional sunroof with a properly fitted gasket maintains the vehicle s premium appearance. For resale purposes, a well-maintained sunroof can positively influence potential buyers perceptions of the car s condition.

6. **Ease of Installation (With Proper Tools)**

While some may find DIY installation challenging, the gasket is typically straightforward to replace with basic tools (e.g., pry bar, adhesive cleaner, and new sealant). Many owners or mechanics can complete the job in a few hours, especially with step-by-step guides or videos.

7. **Cost-Effective Solution**

Replacing the gasket is significantly cheaper than overhauling the entire sunroof assembly or dealing with water damage. Prices for these gaskets (OEM or aftermarket) are relatively affordable compared to the potential long-term costs of neglect.

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### **Cons**

1. **Potential for Counterfeit or Low-Quality Parts**

Purchasing from untrusted sellers (especially online marketplaces) risks receiving substandard or counterfeit gaskets. These may not seal properly, leading to recurring leaks or premature failure. Always buy from reputable suppliers (e.g., official Mercedes-Benz dealers, authorized aftermarket parts vendors, or well-reviewed online retailers).

2. **Installation Challenges**

The sunroof gasket is located in a tight, hard-to-reach area, and improper handling can damage the surrounding roof panel or trim. Without experience, owners may struggle to remove old adhesive residue, align the new gasket correctly, or apply the right amount of sealant. Rushing the job can result in gaps or misalignment.

3. **Adhesive and Cleaning Requirements**

Removing old adhesive or silicone from the roof frame requires solvents (e.g., brake cleaner, adhesive remover) and careful scraping. Failure to clean thoroughly can prevent the new gasket from sticking properly, leading to leaks. Improper adhesive application (too much or too little) can also cause issues.

4. **Time-Consuming Process**

The job demands patience, especially for first-time DIYers. It may take several hours to fully disassemble the sunroof, clean the area, install the gasket, and reapply sealant. Some owners may prefer to pay a mechanic for efficiency, though labor costs add to the expense.

5. **Risk of Overlooking Underlying Issues**

If the sunroof motor, tracks, or cables are worn, replacing just the gasket may not fully resolve functionality problems. Owners should inspect these components during the process and address any defects to avoid future failures.

6. **Limited Lifespan of Aftermarket Parts**

While high-quality aftermarket gaskets are durable, they may not match the longevity of OEM parts. Over time, even a properly installed gasket can degrade due to UV exposure, temperature fluctuations, or general wear. Regular inspections are recommended.

7. **Potential for Voiding Warranty (If Applicable)**

If the vehicle is still under warranty, attempting a DIY replacement especially with aftermarket parts could void coverage for sunroof-related issues. It s wise to consult the warranty terms before proceeding or opt for dealer service.

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### **Conclusion**

Replacing the sunroof rubber gasket in your W164 ML350/ML500 (2005 2011) is a practical and cost-effective solution to prevent leaks, improve comfort, and maintain the vehicle s value. The benefits of a properly sealed sunroof such as enhanced weather protection, smoother operation, and long-term damage prevention far outweigh the minor challenges of installation and part selection.

However, the process requires careful planning, the right tools, and patience. Buyers should prioritize quality parts from trusted sources and be prepared for the time and effort involved. For those uncomfortable with DIY repairs, professional installation is a viable option, though it incurs additional labor costs.

### **Recommendation**

1. **Source the Parts Carefully**: Purchase the gaskets (1647800340 and 1647800440) from an authorized Mercedes-Benz dealer, a reputable aftermarket supplier (e.g., Dorman, Fel-Pro, or local specialty shops), or a well-reviewed online retailer with a return policy. Avoid no-name brands to ensure durability.

2. **Gather Tools and Materials**: Acquire a pry bar, adhesive remover (e.g., Goof Off), brake cleaner, high-quality automotive sealant (e.g., Permatex Ultra Black Silicone), and a clean microfiber cloth. A friend or helper can assist with holding parts in place.

3. **Follow a Step-by-Step Guide**: Use detailed instructions from Mercedes-Benz service manuals or trusted online resources (e.g., YouTube tutorials from experienced mechanics). Pay close attention to cleaning the adhesive residue and applying sealant evenly.

4. **Inspect the Sunroof System**: While replacing the gasket, check the sunroof motor, tracks, and cables for wear. Lubricate moving parts if needed to ensure smooth operation.

5. **Consider Professional Help if Needed**: If the vehicle is still under warranty or if you re unsure about the process, consult a Mercedes-Benz specialist. They can perform the replacement efficiently and may offer warranty coverage for related issues.

6. **Test Thoroughly After Installation**: After completing the job, test the sunroof multiple times to ensure it opens and closes smoothly without leaks. Check for drafts or condensation in the cabin during rain or wind.

By taking these steps, you ll maximize the success of the replacement and enjoy a properly functioning sunroof for years to come.

Details:

Please refer to pictures for item condition.

part #: 1647800340 prices

• $18.00-$236.55

specifications vintagwinde:

• for models: W164, Ml350, Ml500
• for makes: Mercedes
• for years: 2005-2011
• mpn: 1647800340
• type: Gasket
• oe/oem part number: Side Opening Vent Left Right
• color: Black
• material: Rubber
• placement on vehicle: Upper
• country of origin: Germany

shipping vintagwinde:

• transit: 5-9 Days
• class: Economy, Standard, Expedited
• service: Economy, Standard, USPS Priority Mail
• type: Fixed
• carrier: USPS
• cost: $0.00

seller vintagwinde:

• # reviews: 20978
• rating: 100.0%
• city: East Setauket, New York

general vintagwinde:

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

returns vintagwinde:

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

offer vintagwinde:

• availability: In Stock
• best offers: True
• started: February 15, 2026
• quantity: 1
• sold: 0
• options: Ship-to-home

payments vintagwinde:

• other
• wallet: Paypal
• credit card: Visa

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