Mercedes W204 W212 W221 Cylinder Head Bank 1-3 Left N/S OM642 V6 A6420106720

Mercedes W204 W212 W221 Cylinder Head Bank 1-3 Left N/S OM642 V6 is a specialized component from the Cylinder Heads category, designed for use on the left side of the engine unit. This used, original cylinder head ensures the proper combustion process in a V6 petrol engine, maintaining the factory geometry of the ports and combustion chambers. It is a solution for users who expect a robust part with parameters consistent with the Mercedes manufacturer's design.

Specifications and technical data

• SKU: A6420106107
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420106107
• Substitutable numbers: A6420106107, A 642 010 61 07, A6420106720, A 642 010 67 20, R6420163901, R 642 016 39 01, A6420502801, A 642 050 28 01, A6420503501, A 642 050 35 01
• Location on the vehicle: Left
• Fuel type: Petrol
• Part type: Cylinder Head
• Category: Cylinder Heads

Purpose and compatibility

The presented cylinder head is dedicated to Mercedes W204, W212, and W221 class models with the OM642 V6 engine, mounted on the left side for cylinders 1–3. The design, adapted for a petrol unit, allows for maintaining appropriate operating parameters, such as combustion chamber tightness, proper cooling, and stable valve operation.

By maintaining the original architecture of the intake and exhaust ports, the cylinder head works with factory engine accessories, which facilitates installation and reduces the need for additional modifications. This is particularly important for repairs where precise fitment to the existing engine block and fuel system is essential.

Construction and functional parameters

The cylinder head is responsible for guiding the fuel-air mixture, exhausting gases, and providing stable seating for valves and spark plugs in a petrol engine. In the case of the OM642 V6 unit, the left cylinder head services three cylinders, which requires maintaining appropriate structural rigidity and precision in the surface finish where it meets the block.

Key functional features of this cylinder head include:

• precisely shaped intake and exhaust ports,
• mating surface prepared for use with a cylinder head gasket,
• locations for valve guides and valve seats adapted to the OM642 engine specification,
• construction optimized for operation in a petrol unit.

Such a solution allows for maintaining stable engine operating parameters, including uniform combustion and proper heat dissipation from the combustion chamber.

Use in repairs and reconditioning

The used cylinder head is suitable for professional Mercedes engine repairs where it is necessary to replace a damaged component while maintaining factory specifications. It can be used both for direct replacement and as a base for further workshop processing, such as resurfacing, valve seat machining, or the installation of new guides.

For workshops specializing in Mercedes V6 units, this is a practical solution that allows for shorter repair times and reduced costs compared to purchasing a new cylinder head. Maintaining the original design also facilitates diagnostics and subsequent servicing of the engine unit.

Benefits of using an original Mercedes cylinder head

Using an original cylinder head in the OM642 engine provides a number of operational benefits. Above all, it ensures compliance with factory tolerances, which translates into uniform cylinder operation, correct compression, and stable combustion parameters. This, in turn, affects the engine's refinement, performance, and fuel consumption.

Choosing a component from the Cylinder Heads category dedicated to a specific engine configuration minimizes the risk of installation problems and incompatibility with accessories. For the user, this means a more predictable repair process and greater confidence in the final result.

Expanding the scope of service work

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as additional cylinder heads, covers, or mounting elements, check the available parts in the Mercedes Cylinder Heads category.

When working on the engine unit, it is also worth paying attention to the condition of the cooling system, which has a direct impact on the durability of the cylinder head and the entire engine. Useful information on symptoms of overheating, diagnostic methods, and the impact of radiators on engine lifespan can be found in the article Engine cooling system – overheating, repair, and used radiators.