fits make: Mercedes. year: 2007.

( Manufacturer Part Number: 75142 ), ( Seller Notes: Lh, 5.5l, 7at ), ( Color: Sil ), ( Genuine Oem: No ), ( Make: Mercedes-benz ), ( Type: Engine Cylinder Head ), ( Manufacturer Warranty: Unspecified Length ), ( Interchange Item Code: 306 ), ( Partout Id: A-130388802 )
The **Mercedes-Benz 75142 Left Engine Cylinder Head (2007 S-Class, W221, 164 Series)** is a precision-engineered component integral to the performance, reliability, and longevity of the iconic **M276 V8 engine**, which powers the legendary **S-Class (W221)** from 2007 onward. This high-performance cylinder head, manufactured to Mercedes-Benz s exacting standards, is designed to accommodate the **5.5-liter (5,461 cc) naturally aspirated V8** found in models such as the **S550, S55 AMG, and S63 AMG**, ensuring optimal combustion efficiency, thermal management, and power delivery. Crafted from **high-grade aluminum alloy (A356 or A357)** with **hypereutectic silicon content**, the head is engineered to withstand extreme operating temperatures, high cylinder pressures, and the demanding stresses of high-performance driving, whether on the highway or in spirited acceleration scenarios.
The **75142 cylinder head** features a **dual overhead camshaft (DOHC) design** with **four valves per cylinder (two intake and two exhaust)**, allowing for precise airflow control and improved combustion dynamics. Each camshaft is driven by a **timing chain** (or in later models, a **timing belt** in some variants) from the crankshaft, ensuring synchronized valve operation for maximum efficiency. The head incorporates **pneumatic or hydraulic valve lifters**, depending on the specific engine variant, which compensate for wear and maintain consistent valve clearance, reducing mechanical friction and enhancing durability. The **intake and exhaust ports** are meticulously machined to optimize airflow, contributing to the engine s **torque-rich delivery** and **smooth power band**, a hallmark of the S-Class s legendary driving experience.
Thermal management is a critical aspect of this cylinder head, as the **W221 s V8 operates at elevated temperatures** to achieve peak performance. The head is equipped with **integrated cooling passages** and **high-flow water jackets**, which circulate engine coolant to dissipate heat and prevent thermal warping or detonation. Additionally, the **spark plug bores** are precision-drilled to accommodate **NGK or Bosch high-performance plugs**, ensuring reliable ignition and consistent combustion. The **valve springs and retainers** are designed to handle the high RPM capabilities of the AMG variants, while the **exhaust valves** often feature **sodium-filled stems** to improve heat dissipation and longevity.
For maintenance and serviceability, the **75142 cylinder head** is built with **easy-access features**, including **removable valve covers** (typically made of plastic or lightweight composite materials) and **separate rocker arm covers** that allow for straightforward inspection and adjustment. The **camshaft bearings and oil galleries** are strategically placed to ensure adequate lubrication under all operating conditions, reducing wear and extending the engine s service life. When servicing this component, it is essential to use **OEM-specification gaskets**, such as **Fel-Pro or ATE**, to prevent oil leaks and ensure a proper seal between the head and block.
This cylinder head is a **direct replacement part** for the original equipment (OEM) component, meaning it adheres to **Mercedes-Benz s exact specifications**, including **thread sizes, bolt patterns, and mounting dimensions**. Whether replacing a worn head due to **thermal stress, warping, or internal damage**, or as part of a **restoration or performance upgrade**, the **75142** ensures that the **S-Class s V8 continues to deliver its signature blend of power, refinement, and reliability**. For optimal performance, it is recommended to pair this head with **high-quality intake and exhaust manifolds**, **performance camshafts** (if modifying), and **properly tuned ignition and fuel systems** to maintain the engine s intended performance characteristics. This component is a **cornerstone of the W221 s legendary engineering**, embodying Mercedes-Benz s commitment to precision, performance, and enduring luxury.
### **Pros and Cons of Buying a Mercedes-Benz 75142 Left Engine Cylinder Head (2007 S-Class, 164 Typ)**
#### **Pros:**1. **High-Quality Build and Prestige** The Mercedes-Benz S-Class is renowned for its luxury, craftsmanship, and engineering excellence. The 2007 model, in particular, represents a peak in German engineering before some later refinements.
2. **Strong Engine Performance** The M276 engine (V8 or V12, depending on the variant) is a robust powerplant known for smooth operation, high torque, and reliability when maintained properly. The left cylinder head (75142) is part of this engine s core, meaning it plays a critical role in performance and efficiency.
3. **Aftermarket Support** As a high-end Mercedes, this part has a strong aftermarket presence, including remanufactured heads, gaskets, and performance upgrades. This makes repairs and modifications more accessible.
4. **Potential for Restoration** If the cylinder head is in good condition, restoring it could significantly improve the engine s performance and longevity. Many enthusiasts value the challenge and reward of bringing a classic luxury car back to its best state.
5. **Investment Potential** The S-Class holds its value well, and a well-maintained engine with a restored cylinder head could be appealing to collectors or buyers seeking a premium luxury vehicle.
6. **Compatibility with Classic Tuning** The M276 engine is a favorite among tuners for its ability to handle forced induction (turbocharging/supercharging) and high-performance modifications, making it a desirable component for enthusiasts.
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#### **Cons:**1. **High Cost of Replacement or Restoration** Cylinder heads, especially for a luxury vehicle like the S-Class, are expensive to purchase, labor-intensive to replace, and require specialized expertise. The 75142 part alone may cost several hundred to over a thousand dollars, depending on condition and source.
2. **Complexity of Maintenance** The S-Class engines, particularly the V8/V12 variants, require precise tuning, high-quality fluids, and regular maintenance to avoid issues like carbon buildup, valve train wear, or oil consumption. Neglecting maintenance can lead to costly failures.
3. **Potential for Hidden Issues** A used cylinder head may have internal damage (warped surfaces, cracked valves, or worn seals) that isn t immediately visible. Without a thorough inspection (including pressure testing, valve grinding, and gasket sealing), hidden problems could arise after installation.
4. **Limited Availability of OEM Parts** While aftermarket options exist, original equipment manufacturer (OEM) parts for older Mercedes models can be harder to source, leading to longer wait times or higher costs.
5. **Risk of Overbuilding** If the rest of the engine or drivetrain isn t up to par, installing a high-quality cylinder head without addressing other components (e.g., intake manifold, fuel system, or exhaust) could lead to performance bottlenecks or premature failure.
6. **Time-Consuming Project** Restoring or replacing a cylinder head is a labor-intensive process that requires disassembly, cleaning, machining, and reassembly. This may not be feasible for casual drivers or those without mechanical experience.
7. **Depreciation Concerns** While the S-Class retains value, the cost of ownership (insurance, maintenance, and potential repairs) can be prohibitive. If the vehicle isn t a primary driver, the expense may not be justified.
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### **Conclusion:**Buying a **Mercedes-Benz 75142 left engine cylinder head (2007 S-Class, 164 Typ)** can be a rewarding project for enthusiasts, restorers, or performance-focused owners who prioritize quality and longevity. The part itself is a high-value component that, when properly restored or replaced, can significantly enhance an engine s performance and reliability. However, the project demands financial investment, technical skill, and patience. It is not a suitable undertaking for those seeking a quick or low-cost fix.
For the right buyer someone with mechanical experience, access to quality parts, and a long-term commitment to the project the cylinder head can be a valuable addition to a luxury or performance-oriented Mercedes. For others, it may be more prudent to opt for a remanufactured or aftermarket solution that balances cost and reliability.
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### **Recommendation:** 1. **If you are a DIY enthusiast with mechanical skills:**- Purchase a **high-quality used or remanufactured cylinder head** from a reputable supplier (e.g., MBB Performance, JE Specialties, or a trusted local mechanic).
- **Inspect thoroughly** for warping, cracks, or internal damage before purchasing.
- **Budget for professional machining** if the head requires valve grinding, decking, or gasket sealing.
- **Ensure the rest of the engine is in good condition** (oil consumption, valve train, fuel system) to avoid mismatches.
2. **If you lack mechanical experience or time:**- **Consult a Mercedes specialist** to assess whether restoring the cylinder head is worth the cost and effort.
- Consider **remanufactured or aftermarket alternatives** (e.g., JE or MBB heads) that offer similar performance at a lower price.
- **Prioritize OEM or high-quality aftermarket parts** to avoid future issues.
3. **If you are restoring a classic S-Class:**- Treat the cylinder head as part of a **comprehensive engine rebuild**, addressing all wear points (pistons, rods, bearings, seals) for long-term reliability.
- **Document the process** and consider consulting a Mercedes engineer for guidance on tuning and performance goals.
4. **If the goal is purely aesthetic or collector value:**- Focus on **cosmetic restoration** and ensure the engine is **running smoothly** without overhauling the cylinder head unless necessary.
- **Verify the vehicle s service history** to avoid hidden engine issues.
Ultimately, the decision depends on your **budget, skills, and goals**. For performance and longevity, investing in a quality cylinder head is justified, but for casual use, it may be more practical to rely on maintenance and aftermarket solutions. Always prioritize **quality over cost** in luxury automotive projects.
Original parts mean a perfect fit. Every part is cleaned, tested and inspected by experts. 221 Type S550 R. Parts go back into cars rather than landfill.
This part fits vehicles made in the follow ING years 2007 ,2008,2009,2010,2011,2012. All parts are covered by warranty. Unless specified as Universal this is a direct fit Engine Cylinder Head.