TW38D9 Fuel Filler Neck Seal

( Brand: Genuine ), ( Manufacturer Part Number: TW38D9 ), ( Part Type: Fuel Seal Filler ), ( Product Warranty: 12 Month Warranty ), ( Part Info: Filler Neck Seal ), ( Years: 1983 1979 1985 1972 1977 1974 1987 1984 1976 1991 1988 1986 1980 ), ( Makes: Mercedes ), ( Important: Please Read All Notes Before Making This Purchase ), ( Cs-sku: 400 )

Review GENUINE Fuel Filler Neck Seal fits 450SL 380SL 560SL 350SL 240D 300CD 420SEL 300TD 1972–1991

The **TW38D9 Fuel Filler Neck Seal** is a precision-engineered, high-performance replacement part designed specifically for Mercedes-Benz models including the **C-Class (C320d, C300 CDI, C450 SL, C380 SL, C560 SL, C350 SL, and C420 SEL)**, ensuring a secure, leak-free fuel system while maintaining optimal functionality and durability. Crafted from high-quality, automotive-grade materials, this seal is engineered to withstand the demanding conditions of modern fuel injection systems, providing a tight, reliable fit that prevents fuel vapors from escaping and contaminants from entering the filler neck. The seal features a **robust, flexible rubber compound** that resists cracking, swelling, or degradation over time, even under prolonged exposure to fuel, heat, and environmental elements, making it ideal for both new installations and repairs. Its **precision-cut design** ensures a perfect alignment with the fuel filler neck and cap, eliminating gaps that could lead to leaks or fuel odor, while its **durable construction** guarantees long-term reliability, reducing the risk of premature wear or failure. Whether you're performing a routine maintenance check, addressing a fuel system leak, or upgrading your vehicle s fuel system components, this **OEM-quality replacement seal** delivers the performance and dependability expected from Mercedes-Benz standards, ensuring a seamless fit and hassle-free operation for years to come.

### **Pros and Cons of buying a TW38D9 Fuel Filler Neck Seal for Mercedes-Benz Models (W212, W213, W214, W215, W204, W205, W206)**

1. **Direct Fitment** The TW38D9 is specifically designed for the **W212 (S350/S450/S560/SL 380/SL 560), W213 (SL 350/SL 560), W204 (240d/300cd), W205 (300td), and W215 (420 SEL)** platforms, ensuring compatibility without modifications.

2. **High-Quality Material** Made from durable rubber and reinforced components, it is engineered to resist fuel leaks, corrosion, and wear over time, extending the life of the fuel system.

3. **Prevents Fuel Spills** A properly sealed fuel filler neck prevents fuel leaks during refueling, reducing environmental hazards and potential fire risks.

4. **Easy Installation** Designed for straightforward replacement, often requiring only basic tools and minimal disassembly, making it a DIY-friendly upgrade.

5. **Compatibility with Aftermarket Parts** Works well with other fuel system upgrades (e.g., fuel line replacements, filler door modifications) without causing interference.

6. **Warranty Coverage** Reputable sellers (such as **Mercedes-Benz approved suppliers or trusted aftermarket brands**) may offer warranties, providing peace of mind against defects.

7. **Cost-Effective Long-Term Solution** Replacing a worn-out OEM seal prevents more expensive fuel system damage (e.g., fuel pump contamination, interior leaks) in the future.

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1. **Potential Counterfeit Risks** Some third-party sellers may offer **fake or low-quality replicas**, leading to premature failure, leaks, or installation issues. Always verify the seller s reputation.

2. **Mixed Reviews on Durability** While many users report long-term reliability, others (particularly in older vehicles) have noted **shorter lifespan than OEM parts**, especially if the fuel system has existing contaminants.

3. **Installation Challenges** In some cases, the **filler neck assembly may require removal of the fuel tank or filler door**, which can be labor-intensive for inexperienced DIYers.

4. **Limited Availability** Unlike OEM parts, aftermarket seals may not be as widely stocked in local Mercedes-Benz dealerships, requiring online purchases.

5. **Compatibility with Modified Systems** If the vehicle has **aftermarket fuel lines, upgraded fuel pumps, or modified filler doors**, the TW38D9 may not fit perfectly, requiring additional adjustments.

6. **Price Variability** While generally affordable, prices can fluctuate based on brand reputation, seller location, and whether it s a **new or refurbished** unit.

7. **Possible Residue Issues** If the old seal was not fully removed or the area was not cleaned properly, **fuel residue or debris** could interfere with the new seal s performance.

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The **TW38D9 fuel filler neck seal** is a **solid aftermarket alternative** for the specified Mercedes-Benz models, offering **direct fitment, durability, and ease of installation** in most cases. It is particularly beneficial for owners experiencing **leaks, wear, or contamination** in their fuel system. However, **quality control varies by seller**, and some users may still encounter **shorter lifespan than OEM parts**, especially in high-mileage vehicles.

For **best results**, purchase from **trusted suppliers** (e.g., **Mercedes-Benz Parts, RockAuto, or specialized Mercedes aftermarket stores**) and ensure proper installation. If the vehicle has **extensive fuel system modifications**, verify compatibility beforehand.

- **Buy from a reputable seller** (preferably with customer reviews and return policies).

- **Compare prices** across multiple sources to avoid overpaying for counterfeit or low-quality units.

- **Follow installation instructions carefully**, cleaning the area thoroughly before fitting the new seal.

- **Consider OEM replacement** if budget allows, as it may offer **longer warranty coverage** and superior long-term reliability.

- **Monitor for leaks** after installation if issues persist, inspect for **improper sealing or debris interference**.

**Final Verdict:** The TW38D9 is a **worthwhile upgrade** for most owners needing a **cost-effective, direct-fit solution**, but **due diligence in sourcing and installation** is critical for optimal performance.

Details:

Filler Neck Seal.

part #: tw38d9 prices

• $12.68-$160.97

specifications fueltanksysteme:

• for models: 450sl, 380sl, 560sl, 350sl, 240d, 300cd, 420sel, 300td
• for years: 1972-1991
• brand: Genuine
• mpn: Tw38d9
• part type: Fuel Seal Filler
• product warranty: 12 Month Warranty
• part info: Filler Neck Seal
• years: 1983 1979 1985 1972 1977 1974 1987 1984 1976 1991 1988 1986 1980
• makes: Mercedes
• important: Please Read All Notes Before Making This Purchase
• cs-sku: 400

payments fueltanksysteme:

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

general fueltanksysteme:

• condition: New
• Car Truck Parts Accessories > Air Fuel Delivery > Fuel Tanks Filler Necks

shipping fueltanksysteme:

• type: Fixed
• carrier: FedEx
• transit: 3-7 Days
• cost: $0.00
• class: Standard
• service: FedEx Ground / FedEx Home Delivery

offer fueltanksysteme:

• sold: 0
• quantity: 1
• options: Ship-to-home
• started: June 3, 2026
• availability: In Stock

returns fueltanksysteme:

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

seller fueltanksysteme:

• rating: 98.8%
• # reviews: 68769
• city: Austin, Texas

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