MERCEDES 12760300601 Engine Motor Crankshaft Crank Shaft 12-13-14-15 Benz 3.5L V6
fits model: W212, E350, C350. make: Mercedes. year: 2012–2015.
( Manufacturer Part Number: 12760300601 ), ( Ipn: 12 13 14 15 ), ( Manufacturer Warranty: 3 Months ), ( Oe/oem Part Number: R27603 ), ( Vintage Part: No ), ( Finish: Polished ), ( Country Of Origin: Germany )
Review MERCEDES benz 3.5l V6 Engine Motor Crankshaft Crank Shaft Oem fits W212 E350 C350 2012–2015
The **Mercedes-Benz 12760300601 crankshaft (12-15 W212 E350 C350, 3.5L M276 V6 engine)** is a precision-engineered component at the heart of the legendary **M276 DE35LA** V6 powerplant, renowned for its seamless integration into the **W212 E-Class (2012 2015)** lineup. This forged steel crankshaft, meticulously machined to exacting specifications, serves as the backbone of the engine s dynamic performance, delivering a harmonious balance of power, efficiency, and longevity. Measuring approximately **4.25 inches (108 millimeters) in stroke length** and featuring **five main journals** (including the counterweighted design), it is engineered to withstand the rigorous demands of high-revving applications while maintaining structural integrity under extreme loads. The crankshaft s **forged construction** ensures superior strength and resistance to fatigue, critical for sustaining the **3.5L V6 s** peak torque output of **302 lb-ft (409 Nm)** and its redline of **6,800 RPM**, where the engine s true character shines. Its **precision-ground counterweights** minimize vibration, contributing to the smooth, refined operation that Mercedes-Benz drivers expect from this iconic powertrain. Whether installed in a **C350 sedan, C350 Coupe, or C350 Cabriolet**, this crankshaft plays a pivotal role in transforming fuel into kinetic energy with unparalleled efficiency, embodying the marriage of German engineering precision and automotive excellence. For enthusiasts seeking to restore or upgrade their W212 E350, this OEM-quality crankshaft remains a cornerstone of reliability, ensuring that every rev of the **M276 V6** is met with the same level of performance and durability for which Mercedes-Benz is celebrated.
### **Pros and Cons of Buying a Mercedes-Benz W212 E350 (3.5L V6 Engine, Crankshaft Model 12760300601, 2012 2015)**
#### **Pros**
1. **Reliable V6 Engine**
The 3.5L M276 V6 engine in the W212 E350 is a well-proven unit, known for its durability and smooth power delivery. When properly maintained, it can easily exceed 200,000 miles with minimal issues. The engine is also less prone to catastrophic failure compared to some turbocharged or high-stress modern engines.
2. **Comfortable and Refined Ride**
The W212 platform is renowned for its high-quality materials, sound insulation, and smooth suspension tuning. The E350 offers a comfortable ride, making it ideal for long-distance driving and daily use.
3. **Strong Resale Value**
Mercedes-Benz sedans, especially the W212 series, hold their value relatively well compared to many competitors. The E350, in particular, remains a sought-after model, which can be beneficial if you plan to sell or trade it in the future.
4. **Comfortable Interior and Features**
The cabin is spacious, with premium materials (depending on trim), excellent climate control, and a well-designed infotainment system (though some models may have outdated software). The seating is supportive, and the overall fit-and-finish is better than many rivals in its class.
5. **Good Fuel Economy for a V6**
While not as efficient as a modern turbocharged engine, the naturally aspirated 3.5L V6 offers decent fuel economy for its class around **16 18 MPG city / 24 28 MPG highway**, which is reasonable for a luxury sedan of this era.
6. **Low Maintenance Costs (Compared to Modern Luxury Cars)**
Unlike newer Mercedes models with complex hybrid or turbo systems, the W212 s V6 requires fewer high-cost repairs. Basic maintenance (oil changes, timing belt, spark plugs) is straightforward and affordable.
7. **Strong Performance**
The 3.5L V6 produces **283 306 hp** (depending on model year) and **262 lb-ft of torque**, providing a balanced mix of power and refinement. It accelerates well without being overly aggressive, making it enjoyable for both city and highway driving.
8. **Available All-Wheel Drive (Optional)**
The E350 4MATIC models offer better traction in adverse conditions, which can be a significant advantage in snowy or rainy climates.
9. **Classic Mercedes-Benz Driving Experience**
The steering, braking, and overall driving dynamics are well-tuned, offering a refined yet engaging feel that many Mercedes enthusiasts appreciate.
10. **Potential for Modifications**
The W212 platform has a strong aftermarket presence, allowing for upgrades like exhaust systems, suspension tuning, and performance chips to enhance driving dynamics.
---
#### **Cons**
1. **Aging Technology and Infotainment**
The **COMAND system** (depending on the model year) can be slow, glitchy, and lacks modern connectivity features like Apple CarPlay or Android Auto. Navigation is functional but outdated compared to today s standards.
2. **High Cost of Ownership Over Time**
While initial maintenance is affordable, **parts and labor costs can add up** due to Mercedes premium pricing. If major issues arise (e.g., transmission, suspension, or electrical problems), repairs may be expensive.
3. **Transmission Reliability Concerns**
The **7G-Tronic automatic transmission** (used in the W212) is generally reliable but has a reputation for **jerky shifts, delayed engagement, and occasional failure** in later years. Some owners report needing **transmission fluid changes every 30,000 50,000 miles** to prevent issues.
4. **Electrical Gremlins**
Like many Mercedes from this era, the W212 can suffer from **electrical problems**, including:- Faulty sensors (e.g., oil pressure, speed, or camshaft sensors)
- Intermittent power window or seat motor failures
- Infotainment system freezes or unresponsiveness
These issues are often frustrating but rarely catastrophic.
5. **Suspension Wear and Tire Costs**
The W212 s suspension is designed for comfort rather than durability. **Struts, bushings, and control arms** can wear out by **80,000 120,000 miles**, requiring costly replacements. High-quality tires (e.g., Michelin Pilot Sport or Continental Contact) are also expensive.
6. **Fuel Economy Not Great for Modern Standards**
At **16 18 MPG city**, the E350 is **less efficient than modern turbocharged sedans** (e.g., BMW 330i, Audi A6). If fuel costs are a concern, this may be a drawback.
7. **Depreciation Over Time**
While the W212 holds value better than many luxury cars, it has **already depreciated significantly** since its peak. If you plan to keep it long-term, the resale value may not offset the initial purchase price.
8. **Potential for Hidden Issues**
Some W212 models (especially those over **150,000 miles**) may have:- **Water pump failures** (common in V6 engines)
- **Timing chain stretch** (less common than in some other Mercedes engines but still a risk)
- **Exhaust manifold cracks** (especially on older models)
A **pre-purchase inspection (PPI) is highly recommended** before buying.
9. **Limited Modern Safety Features**
While the W212 has **standard safety features** (stability control, multiple airbags, etc.), it lacks **modern advancements** like:- Adaptive cruise control
- Lane-keeping assist
- Blind-spot monitoring
- Advanced collision avoidance systems
10. **Discontinued Model (No Longer Supported)**
Mercedes has **phased out the W212 platform**, meaning:- **No new parts or updates** from the manufacturer.
- **Dealer support may be limited** compared to newer models.
- **Insurance costs** may be higher due to age and parts availability.
---
### **Conclusion**
The **Mercedes-Benz W212 E350 (3.5L V6, 2012 2015)** is a **well-built, comfortable, and capable luxury sedan** that remains a solid choice for buyers who prioritize **refinement, reliability, and driving enjoyment** over the latest technology. It is **best suited for:**
- **Long-distance drivers** who value comfort and smooth operation.
- **Owners who prioritize maintenance simplicity** (no complex turbo/hybrid systems).
- **Those who appreciate classic Mercedes-Benz driving dynamics**.
- **Buyers who can afford occasional repairs** (e.g., suspension, transmission, electrical).
However, it is **not ideal for:**- **Budget-conscious buyers** who expect ultra-low ownership costs.
- **Tech-savvy drivers** who need modern infotainment and safety features.
- **Those who plan to keep the car for 20 years** without major repairs.
- **Buyers in areas with harsh winters** (unless AWD is selected).
### **Recommendation**
If you find a **well-maintained W212 E350 with:**- **Under 120,000 miles** (preferably under 100,000).
- **Complete service history** (oil changes, timing belt, transmission fluid).
- **No major electrical or suspension issues** (verified via PPI).
- **AWD option** (if available, for better traction).
then it is a **strong purchase** that will provide **years of reliable, enjoyable driving**.
**However, if:** - You want **modern tech, better fuel economy, or lower long-term costs**, consider alternatives like:- **BMW 530i (F10/F11)** Similar luxury, often more reliable.
- **Audi A6 3.0T** More efficient, better tech.
- **Lexus GS 350** Extremely reliable, lower maintenance.
- **Used Tesla Model S (if budget allows)** Future-proof, efficient, cutting-edge.
**Final Verdict:**The **W212 E350 is a fantastic car for the right buyer** one who values **luxury, comfort, and driving pleasure** over the latest gadgets. Just **inspect it thoroughly, budget for potential repairs, and enjoy the ride** if it fits your needs.
Details:
part #: 12760300601 prices
- $30.00-$112.50
specifications cranshafengin:
- for models: W212, E350, C350
- for makes: Mercedes
- for years: 2012-2015
- mpn: 12760300601
- ipn: 12 13 14 15
- manufacturer warranty: 3 Months
- oe/oem part number: R27603
- vintage part: No
- finish: Polished
- country of origin: Germany
general cranshafengin:
- condition: Used
- Car Truck Parts Accessories > Engines Engine Parts > Crankshafts
payments cranshafengin:
- credit card: Diners-club
- other
- wallet: Apple-pay
offer cranshafengin:
- availability: In Stock
- options: Ship-to-home
- best offers: True
- sold: 0
- started: February 15, 2026
- quantity: 1
seller cranshafengin:
- rating: 99.1%
- city: Pleasant Grove, California
- # reviews: 4387
shipping cranshafengin:
- class: Standard
- carrier: FedEx
- service: FedEx Ground / FedEx Home Delivery
- cost: $45.00
- type: Fixed
- transit: 5-10 Days
returns cranshafengin:
- paid by: Buyer
- policy: Returns Accepted
- time: 30 Days
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