Intake Manifold Mercedes W639 Diesel OM642 Left Charge Air Line A6420904337

Intake Manifold Mercedes W639 Diesel OM642 Left Charge Air Line is a factory-original air supply system component designed for OM642 diesel engines. This used manifold from the Intake Manifolds category ensures proper airflow to the cylinders on the left side of the engine, which translates into stable engine operation and correct torque characteristics.

Specifications and technical data

• SKU: A6420904337
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420904337
• Substitutable numbers: A6420904337, A 642 090 43 37, A6420901737, A 642 090 17 37
• Location on the vehicle: Left
• Fuel type: Diesel
• Category: Intake Manifolds

Purpose and function in the OM642 engine

The left intake manifold in the OM642 engine is responsible for the even distribution of air to the corresponding cylinders on one side of the unit. Precisely shaped intake runners support proper cylinder filling, which is important for engine smoothness, flexibility, and combustion parameters in a diesel engine.

This component is particularly important in modern diesel units, where airflow works in conjunction with the turbocharging system, exhaust gas recirculation, and electronic control. A functional manifold helps maintain stable boost pressure, reduce power drops, and minimize the risk of rough engine operation.

Construction and vehicle placement

The presented manifold belongs to the Intake Manifolds group and is designed for installation on the left side of the engine. This placement requires a specific body shape and compatibility with other engine accessories, ensuring a proper fit with the cylinder head, intake ducts, and control components.

The solution used in diesel engines requires resistance to elevated temperatures, variable pressure in the intake system, and the presence of contaminants from the exhaust gas recirculation system. This allows the manifold to operate in the demanding conditions typical of diesel engines.

Benefits of using an original intake manifold

Using an original intake manifold in Mercedes models with the OM642 engine allows for maintaining factory airflow parameters and compatibility with the engine control system. This is especially important in diesel units, where even minor deviations in intake geometry can affect fuel dosage, exhaust emissions, and vehicle dynamics.

A used component from this group is a good solution for maintenance repairs when the existing manifold has suffered mechanical wear or damage. It allows for reduced service costs while maintaining a proper fit for the specific engine configuration and accessories.

Application in diesel vehicles

The manifold has been designed to work with diesel-powered engines, meaning it is adapted to the operating characteristics of a diesel engine – higher compression ratio, turbocharged operation, and specific injection mapping. This ensures proper airflow dynamics across the entire RPM range.

When replacing the intake manifold, it is worth paying attention to compatibility with the specific engine version and accessory configuration. An original component designed for a given unit minimizes the risk of installation problems and reduces the need for additional modifications.

Technical support and additional materials

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 manifolds, intake duct elements, or intake housings, check the available parts in the Mercedes Intake Manifolds category.

For users interested in a broader context of intake system operation and its impact on engine performance, material dedicated to tuning and selecting components in the exhaust and intake system may be useful – more information can be found in the article Performance exhaust system: used manifolds and sports catalytic converters on the road.