Mercedes W212 M157 Air Manifold Right O/S Pipe Hose Line Tube A2780981007

The Mercedes W212 M157 Right Air Intake Hose is a precisely engineered intake duct designed for gasoline engines, responsible for the stable delivery of air to the fuel system. Thanks to its factory geometry and fit for the right side of the engine bay, it ensures proper airflow and supports smooth engine operation across the entire load range. This solution is dedicated to users seeking consistency with the factory intake system design in Mercedes models with the M157 engine.

Specifications and technical data

• SKU: A2780981007
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2780981007
• Substitutable numbers: A2780981007, A 278 098 10 07
• Location on the vehicle: Right
• Fuel type: Petrol
• Category: Other Air & Fuel Delivery

Purpose and Function in the Intake System

The described air intake hose operates within the gasoline engine's fuel system, directing air on the right side of the engine bay. The appropriate shaping of the duct reduces pressure drops, minimizes turbulence, and helps maintain stable operating conditions for the powertrain, which is important for both performance and refinement.

This component is particularly crucial in high-performance engines like the M157, where the intake system must ensure adequate flow efficiency while maintaining sealing and temperature resistance within the engine bay. A correctly selected intake hose reduces the risk of leaks, power loss, and errors related to airflow readings by the engine control unit.

Construction and Fit for the Right Side of the Vehicle

The hose is designed as a component mounted on the right side of the vehicle, with geometry adapted for routing the duct in the confined space of the engine bay. Its specific profiling allows it to bypass adjacent components while maintaining safe distances from hot and moving parts.

This fit translates to:

• stable mounting in factory attachment points,
• maintaining proper sealing of connections with other intake components,
• reducing vibrations and stresses during engine operation.

As a result, the intake system retains parameters close to factory specifications, which is key for servicing and repairing M157 units in the Mercedes W212.

Application in the M157 Gasoline Engine

Gasoline engines, especially turbocharged ones, are sensitive to any changes in airflow. The right-side air intake hose is responsible for delivering the correct amount of air to further system components, working in conjunction with engine accessories and control electronics. Maintaining the proper cross-section and length of the duct influences:

• engine response to accelerator pedal input,
• idle stability,
• correct fuel-air mixture values.

Selecting a component consistent with the M157 design helps avoid issues with control unit adaptation, incorrect flow readings, or undesirable power drops. This is particularly important in dynamically driven vehicles where repeatability of engine operating parameters is significant.

Characteristics of a Used Part

The offered intake hose is a used part, allowing for economical repair while maintaining the original system design. Such components are often chosen for servicing advanced units where compliance with the factory design and direct replacement of a worn or damaged duct are important.

In practice, this means that with proper installation, correct airflow in the intake system can be restored without the need for aftermarket replacements with uncertain geometry. The original duct design promotes the retention of factory engine operating parameters and facilitates future diagnostics.

Complementary Parts and Technical Knowledge Development

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other parts from the same group, such as intake ducts, vacuum hoses, or additional air lines, check the available parts in the category Other Mercedes.

To better understand the design differences between sports and standard car versions, including the impact of the intake system, chassis, and brakes on a car's character, it is worth reading the material: Audi RS vs. Other Models – What's Under the Hood and Chassis?. This type of knowledge helps in consciously selecting components and planning modifications and servicing for high-performance vehicles.