Mercedes W204 S212 W639 W906 Exhaust Manifold Left N/S 3.0 Diesel A6421400509

Mercedes W204 S212 W639 W906 Exhaust Manifold Left N/S 3.0 Diesel is an original exhaust system component designed for Mercedes diesel engines. Thanks to its factory-spec geometry and precise fitment to the cylinder head, it ensures stable exhaust gas discharge and proper cooperation with the turbocharger. This is a solution for users who are looking for a proven, compatible component rather than random aftermarket replacements.

Specifications and technical data

• SKU: A6421400509
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421400509
• Substitutable numbers: A6421400509, A 642 140 05 09
• Location on the vehicle: Left
• Fuel type: Diesel
• Category: Turbos & Parts

Purpose and function of the exhaust manifold

The exhaust manifold in a diesel engine is responsible for collecting exhaust gases from individual cylinders and directing them to the rest of the system, including the turbocharger. The presented model features a design tailored to Mercedes 3.0 Diesel units, which promotes even exhaust flow and stable operation of the auxiliary equipment. Its placement on the left side of the engine allows for proper routing of the exhaust channels and maintains the required clearances from other components in the engine bay.

Compatibility with Mercedes models

The described exhaust manifold has been designed for Mercedes vehicles from the W204, S212, W639, and W906 families equipped with a 3.0 diesel engine. This means that the connection geometry, mounting hole spacing, and the shape of the exhaust channels are adapted to the architecture of these power units. As a result, this component can be used both for standard replacement of a worn-out manifold and for repairs related to the turbocharger system and parts.

Benefits of using an original manifold

Using an original exhaust manifold in a diesel engine translates into a number of practical benefits:

• maintenance of factory exhaust flow parameters, which promotes proper turbocharger operation,
• proper fitment to the cylinder head and seals, reducing the risk of leaks,
• stable operating conditions at high temperatures typical for diesel units,
• possibility of using existing mounting points and hardware without modifications.

Thanks to this, the manifold can be used as a component to restore the correct operating parameters of the exhaust system in vehicles used intensively, e.g., in fleet or delivery applications.

Characteristics of the used component

The offered exhaust manifold is a secondary market item, which means it comes from vehicle dismantling. Such components are often chosen by users looking for a reasonable compromise between repair costs and maintaining the original technical specifications. A used manifold, after proper verification, allows for restoring the correct patency of the exhaust system and limiting the risk of leaks in the area of the connection with the turbocharger.

In the case of components operating at high temperatures, material resistance and geometry retention are particularly important. Choosing an original used manifold instead of a low-quality replacement helps maintain the proper operating conditions of the diesel engine, which is important for both the durability of the unit and the stability of operational parameters.

Ecological and economic aspect

By choosing a used exhaust manifold, you reduce the amount of waste and decrease the demand for the production of new components, which translates into a lower carbon footprint associated with vehicle operation. If you want to better understand how reusing original parts affects the environment and why it is also an economically beneficial solution, read the article Sustainable automotive: How buying original used parts reduces the carbon footprint and protects the environment?.

Mercedes turbochargers and parts – system expansion

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as turbocharger housings, exhaust supply lines, or mounting elements, check the available parts in the Mercedes turbochargers and parts category.