Mercedes W210 W220 M112 Petrol Exhaust Manifold 1-3 Cyl A1121402809

Mercedes W210 W220 M112 Gasoline Exhaust Manifold A1121402809 is an original part from the Exhaust Manifolds group, designed for M112 gasoline engines. This is a used, fully functional component that allows for the preservation of the engine's factory operating characteristics and proper exhaust gas evacuation from the left side of the engine.

Specifications and technical data

• SKU: A1121402809
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1121402809
• Substitutable numbers: A1121402809, A 112 140 28 09, KZ
• Location on the vehicle: Left
• Fuel type: Petrol
• Category: Manifolds & Headers

Purpose and Function of the Exhaust Manifold

The presented exhaust manifold has been specifically designed for M112 gasoline engines installed in Mercedes W210 and W220 models. It is responsible for collecting exhaust gases from the cylinders on the left side of the engine and their subsequent, uniform discharge to other components of the exhaust system. By maintaining the original geometry of the channels, it ensures stable exhaust pressure, which translates to proper engine operation, smooth running, and predictable response to load.

Construction, Fitment, and Installation

The exhaust manifold in this series is a factory-produced construction, prepared for installation in place of the original component on the left side of the engine. The mounting hole spacing, flange shape, and connection positions are consistent with Mercedes' factory solutions, which facilitates installation and minimizes the need for additional modifications. In practice, this means the possibility of using existing mounting points in the cylinder head and compatibility with the vehicle's stock exhaust system.

Thanks to its original design, the manifold works well with factory heat shields and other components in the engine bay. This is important both for thermal safety and for the durability of adjacent parts.

Application in M112 Gasoline Engines

M112 engines are popular Mercedes gasoline units where proper exhaust flow is crucial for performance, fuel consumption, and emissions. Using the correct exhaust manifold on the left side allows for maintaining:

• stable operating parameters of the exhaust system,
• proper interaction with oxygen sensors and further exhaust components,
• consistent torque characteristics across the entire RPM range.

For users who want to preserve the factory characteristics of their vehicle, choosing an original manifold from the Exhaust Manifolds group is a technically safe and predictable solution.

Condition, Benefits of Choosing a Used Part, and Economic Aspects

The offered exhaust manifold is a used part, which significantly reduces the repair cost compared to a new component, while maintaining original construction and fitment. For many owners of Mercedes W210 and W220, this is a sensible compromise between durability and budget, especially for older vehicles where maintaining functionality with controlled expenses is key.

If you want to analyze the differences between new and used parts in more detail – in terms of cost, quality, and durability – our blog article will be helpful: comparison of new and used car parts. You will find practical tips there on how to make informed choices about components for your car.

Technical Support and Additional Materials

When selecting an exhaust manifold for a Mercedes with an M112 engine, it is worth paying attention to compatibility with the specific body version and exhaust system configuration. If you have any doubts, additional technical information and application examples described in the blog article dedicated to exhaust systems may be helpful: performance exhaust systems and used manifolds for popular brands. This is a good source of knowledge if you are considering replacing or upgrading the exhaust system in your car.

If you are planning a comprehensive repair or upgrade of the exhaust system area in your Mercedes and need other parts from the same group, such as manifolds, connecting pipes, or other exhaust components, check the available parts in the category Mercedes Exhaust Manifolds.