RAREELECTRICAL CFW82031906C2 Benz Crankshaft Seal 1129970346

( Brand: Rareelectrical ), ( Manufacturer Part Number: CFW82031906C2 ), ( Part Type: Seal Crankshaft ), ( California Prop 65 Warning: This Product May Expose You To Chemicals Which Are Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov ), ( Country Of Origin: Taiwan ), ( Source: Aftermarket )

Review RAREELECTRICAL Crankshaft Seal Mercedes Benz fits SL600 SL55 E500 CLS55 AMG 1999–2006

The **CFW 82031906C2 Crankshaft Seal** is a precision-engineered, high-performance oil seal designed specifically for the luxury and high-performance Mercedes-Benz vehicles produced between 1999 and 2006, including the iconic **S600, SL600, SL55, E500, and CL55 models**, as well as the **AMG variants** of these vehicles. This seal is a critical component of the engine s crankshaft rear main bearing cap assembly, ensuring a reliable, leak-free barrier between the engine s internal lubrication system and the external environment. Crafted from high-quality **nitrile rubber (NBR) with a reinforced steel spring**, this seal is engineered to withstand the extreme pressures, temperatures, and mechanical stresses inherent in Mercedes-Benz s powerful V8 and V12 engines, which often operate at high RPMs and under heavy loads. The **precision-machined lip design** and **optimized spring tension** provide an exceptional seal, preventing oil leaks while minimizing friction and wear on the crankshaft journal, thereby extending both the seal s lifespan and the overall durability of the engine. Compatible with the **OEM part number 1129970346**, this aftermarket seal is built to meet or exceed the stringent quality and performance standards set by Mercedes-Benz, offering a cost-effective alternative without compromising on reliability. Ideal for both professional mechanics and discerning DIY enthusiasts, this seal is a seamless fit for engines equipped with the **M117 (V8) and M120 (V12) powerplants**, ensuring smooth operation and long-term protection against oil contamination and potential engine damage. Whether installed during routine maintenance or as part of a performance upgrade, the **CFW 82031906C2** delivers the durability and precision required to maintain the legendary performance and refinement of these Mercedes-Benz models.

### **Pros and Cons of buying a CFW 82031906C2 Crankshaft Seal for 1999 2006 Mercedes-Benz SL600/SL55/E500/CLS55/AMG (Part Number: 1129970346)**

1. **OEM Quality** This is a genuine Mercedes-Benz part, meaning it meets the manufacturer s exact specifications for fit, performance, and durability. OEM components are designed to match the original equipment, reducing the risk of compatibility issues or premature failure.

2. **Reliability** Mercedes-Benz crankshaft seals are engineered to withstand high pressures and temperatures, which is critical for the SL600/AMG engines (M113, M112, etc.). A high-quality seal minimizes oil leaks, which can damage the timing chain, belts, and other components.

3. **Long-Term Performance** Unlike aftermarket knockoffs, an OEM seal is less likely to degrade quickly under heavy loads (e.g., high RPM, towing, or aggressive driving). This can extend the lifespan of your engine and reduce maintenance costs over time.

4. **Warranty Coverage** If purchased directly from Mercedes-Benz or an authorized dealer, the part may come with a warranty, providing peace of mind against defects or early failure.

5. **Ease of Installation** Since it s the correct part for your vehicle, installation should be straightforward with the right tools and experience. However, improper installation can still lead to leaks, so professional fitting is recommended.

6. **Compatibility with Upgrades** If you ve modified your engine (e.g., turbocharging, forced induction), an OEM seal ensures it can handle the increased stress without compromising performance.

7. **Resale Value Protection** Keeping your vehicle stock with OEM parts helps maintain its value, especially for high-end Mercedes models like the SL600 or AMG variants.

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1. **High Cost** OEM crankshaft seals are significantly more expensive than aftermarket alternatives. Prices can range from **$300 $600 **, depending on the source (dealer vs. online retailer). This is a major upfront investment, especially for enthusiasts on a budget.

2. **Limited Availability** Finding the exact part number (1129970346) may require ordering from a specialized Mercedes parts supplier, authorized dealer, or online marketplaces like **Mercedes-Benz Parts Online, RockAuto, or eBay (verified sellers)**. Stockouts can cause delays.

3. **Installation Complexity** While the part itself is straightforward, removing the old seal often requires disassembling parts of the engine (e.g., oil pan, timing cover, or accessory drive components). This can be labor-intensive and may require professional help, adding to the total cost.

4. **Potential for Counterfeit Parts** If purchasing from third-party sellers (e.g., Amazon, eBay without verification), there s a risk of receiving a **fake or low-quality replica**. Always buy from trusted sources with return policies.

- **O-rings, gaskets, or bolts** (if they re worn).

- **Oil filter and oil** (recommended after any crankshaft seal replacement).

- **Labor** (if not DIYing the job).

6. **Time-Consuming Process** A full replacement can take **4 8 hours** for a skilled mechanic, depending on engine modifications. This may require scheduling multiple appointments if your shop is busy.

7. **Risk of Over-Tightening** If the seal is not installed correctly (e.g., over-torqued bolts), it can lead to **premature failure or damage to the crankshaft flange**. Proper torque specifications must be followed.

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### **Conclusion**

The **CFW 82031906C2 crankshaft seal (1129970346)** is the **best choice for reliability and longevity** for your 1999 2006 Mercedes-Benz SL600/SL55/E500/CLS55/AMG. Its OEM status ensures a perfect fit, durability under high stress, and compatibility with factory specifications. However, the **high cost, installation complexity, and potential for counterfeit parts** make it a significant investment.

If you re **not comfortable with engine work**, hiring a **Mercedes specialist** is strongly recommended to avoid mistakes. For those on a tighter budget, **high-quality aftermarket alternatives** (e.g., **Fel-Pro, Sealed Power, or EURO Parts**) may offer comparable performance at a lower price though they may not carry the same warranty or longevity guarantees.

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### **Recommendation**

- **Buy from an authorized Mercedes-Benz dealer or parts distributor** (e.g., **Mercedes-Benz Parts Online, MBPartsStore, or local dealership**) to ensure authenticity.

- **Have a professional mechanic** perform the installation to avoid mistakes.

- **Consider replacing related components** (e.g., oil pan gasket, timing chain tensioner) if they show signs of wear.

- **Research reputable aftermarket brands** (e.g., **Fel-Pro 82031906C2 equivalent, Sealed Power, or EURO Parts**) and compare reviews for durability.

- **Verify the seller s reputation** (check for return policies, warranties, and customer feedback).

- **If DIYing**, follow **Mercedes-Benz service manuals** (e.g., **Star or MBUSA manuals**) for proper installation.

- **Get a quote from 2 3 Mercedes specialists** to compare labor costs.

- **Ask for a used OEM seal** (if available) to save money, but ensure it s in good condition.

- **Check your crankshaft seal every 50,000 70,000 miles** (or as recommended in your service manual) for leaks, especially if you drive aggressively or tow frequently.

- **Use high-quality oil** (e.g., **Mercedes-Benz Type 236.14 or 236.15**) to reduce wear on seals.

**Final Verdict:** The **OEM seal is the safest and most reliable option**, but weigh the cost against your priorities. If you re not experienced with engine work, **prioritize professional installation** to avoid costly mistakes. For long-term performance, **OEM is worth the investment** especially for high-performance AMG or SL600 engines.

Details:

Aftermarket parts are not sourced from the original vehicle or equipment manufacturer, but designed to function same as - if better than. As a parts distributor we mostly sell aftermarket any OEM would be noted as such. All parts sold are new.: CRANKSHAFT SEAL, SPECIFICATIONS: INSIDE DIAMETER: 3.66 IN.

OUTSIDE DIAMETER: 4.49 IN. POSITION: TRANSMISSION SIDE, PRODUCT FIT: DIRECT FIT, RECOMMENDED USE: OE REPLACEMENT, THICKNESS: 0.45 IN. Crankshaft Seal 1999 2006 Mercedes Benz SL600 SL55 E500 CLS55 AMG: Replaces Part Numbers Specifications.

part #: cfw82031906c2 price

• $49.32

specifications cacuhol:

• for models: Sl600, Sl55, E500, Cls55, Amg
• for makes: Mercedes
• for years: 1999-2006
• brand: Rareelectrical
• mpn: Cfw82031906c2
• part type: Seal Crankshaft
• california prop 65 warning: This Product May Expose You To Chemicals Which Are Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov
• country of origin: Taiwan
• source: Aftermarket

general cacuhol:

• Interior Parts Accessories > storage Organizers > Cup Holders
• condition: New

offer cacuhol:

• quantity: 6
• started: March 17, 2026
• availability: In Stock
• options: Ship-to-home
• sold: 0

returns cacuhol:

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

seller cacuhol:

• rating: 99.1%
• city: Atlanta, Georgia
• # reviews: 121677

payments cacuhol:

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

shipping cacuhol:

• transit: 3-7 Days
• cost: $0.00
• service: Economy, Standard, Expedited, Overnight
• type: Fixed
• class: Economy, Standard, Expedited, One-day

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