Mercedes-Benz M CLK W163 C208 M112 Petrol Exhaust Manifold A1121403109 4-6 Cyl

Mercedes-Benz M CLK W163 C208 M112 Petrol Exhaust Manifold is a factory exhaust system component designed for petrol engines, mounted on the left side of the engine. It is responsible for the efficient discharge of exhaust gases from the cylinders, stabilizing engine operation, and ensuring proper conditions for the subsequent components of the exhaust system. This used OEM component is a sensible choice for technical repairs or restoring the original operating characteristics of the M112 engine in Mercedes M and CLK models.

Specifications and technical data

• SKU: A1121403109
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1121403109
• Substitutable numbers: A1121403109, A 112 140 31 09, KZ
• Location on the vehicle: Left
• Fuel type: Petrol
• Category: Manifolds & Headers

Purpose and function in the exhaust system

The presented exhaust manifold is a component from the Exhaust manifolds group, designed specifically for the M112 engine in Mercedes M-Class (W163) and CLK (C208) vehicles. Its task is to collect exhaust gases from individual cylinders and direct them to the rest of the system while maintaining proper flow and backpressure. A correctly selected manifold has a direct impact on the engine's refinement, throttle response, and the stability of operating parameters when running on petrol.

The placement on the left side of the vehicle means that the part is dedicated to a specific engine cylinder head, which is important for both selection and installation. By maintaining the original geometry of the exhaust channels, the manifold supports the proper operation of lambda sensors and other exhaust system components.

Benefits of using an original Mercedes manifold

Using an original exhaust manifold in the M112 petrol engine ensures:

• Proper installation fitment to the cylinder head and engine accessories without the need for modifications.
• Stable exhaust gas flow, which helps maintain factory power and torque parameters.
• Compatibility with the factory exhaust system, including subsequent pipe sections and exhaust treatment components.
• Reduced risk of leaks at the interface with the cylinder head and the rest of the system, provided correct installation and the use of appropriate gaskets.

A used OEM component is a practical solution for repairs where maintaining the original exhaust system design is crucial without investing in expensive new parts.

Condition, installation, and technical selection

The exhaust manifold is offered as a used part, which allows for an economical repair while maintaining factory design specifications. Before installation, it is recommended to verify the mating surface to the cylinder head, check the threads, and use new gaskets and fasteners to minimize the risk of leaks and exhaust blow-by.

When selecting, it is worth paying attention to compatibility with the M112 engine, petrol fuel type, and the mounting side on the vehicle. This approach facilitates trouble-free installation and reduces vehicle downtime in the workshop.

Application in Mercedes M and CLK vehicles

This exhaust manifold model is intended for Mercedes M-Class W163 and CLK C208 vehicles equipped with the petrol-powered M112 engine. As such, it is a suitable choice both for standard replacement of a worn-out part and for comprehensive exhaust system restoration in these models. Retaining an original part in this area is important for durability, acoustic comfort, and proper interaction with the engine control electronics.

Exhaust system expansion and technical knowledge

If you want to better understand the impact of the exhaust manifold on engine performance and operating characteristics, or if you are considering using used components in performance-oriented projects, it is worth consulting specialized materials. Practical tips on selecting and operating such components can be found in the article Performance exhaust system: used manifolds and sports catalytic converters on the road, where solutions for Mercedes and other popular brands are discussed, among other things.

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 manifold sections, connections, or transition elements, check out the available parts in the Mercedes exhaust manifolds category.