Mercedes-Benz C CLC W203 C180 C230 M111 Petrol Exhaust Manifold A1111404409

Mercedes-Benz C CLC W203 C180 C230 M111 Petrol Exhaust Manifold is a factory-original exhaust system component designed for petrol engines, mounted on the right side of the power unit. This used manifold from the Exhaust manifolds category ensures proper exhaust gas discharge from the cylinder head, stable engine operation, and maintenance of original flow parameters. Thanks to its original design, it is a technically matched solution for the specifics of the M111 unit, allowing for an efficient replacement of a worn-out part.

Specifications and technical data

• SKU: A1111404409
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1111404409
• Substitutable numbers: A1111404409, A 111 140 44 09, A1111404709, A 111 140 47 09
• Location on the vehicle: Right
• Fuel type: Petrol
• Category: Manifolds & Headers

Purpose and function in the exhaust system

The offered exhaust manifold has been designed specifically for M111 series petrol engines in Mercedes C-Class W203 models, where it is responsible for collecting exhaust gases from the cylinders and directing them further into the exhaust system. Its placement on the right side of the power unit ensures compatibility with the factory mounting system, heat shields, and subsequent exhaust components.

By maintaining the original channel geometry, the manifold supports uniform cylinder scavenging, which promotes stable engine operation, proper idle quality, and the maintenance of factory performance. This is particularly important in petrol units, where the quality of exhaust gas discharge affects throttle response and the correct operation of the engine management system.

Benefits of using an original used manifold

Choosing a used, original exhaust manifold for a Mercedes allows you to combine reasonable repair costs with the preservation of factory specifications. This dismantled part:

• maintains the original mounting points to the cylinder head and the rest of the exhaust system,
• ensures compatibility with engine accessories and heat shields,
• reduces the risk of fitment issues common with aftermarket replacements of different geometry.

For users who want to restore the efficiency of the exhaust system without interfering with the vehicle's construction, such a manifold is a practical and technically safe solution. The original design also helps maintain the proper noise level and operating characteristics of the power unit.

Selection and vehicle compatibility

To correctly select this manifold for a specific Mercedes vehicle, it is worth verifying compatibility with the engine code and the mounting side of the vehicle. The product is intended for petrol units, therefore it should not be used in diesel engines. In case of doubts regarding fitment, it is helpful to compare the shape, arrangement of mounting holes, and connections with the currently installed part.

A used exhaust manifold will work well both for standard replacement of a worn component and for repairs related to leaks, cracks, or noise issues in the engine bay area. Using parts from the same design group allows you to maintain the consistency of the entire exhaust system.

Professional application and installation tips

Due to the nature of the exhaust manifold's operation – high temperature, variable loads, and proximity to the cylinder head – installation by an experienced service center or mechanic is recommended. During installation, it is worth paying attention to:

• the condition of the mating surfaces to the cylinder head and the rest of the system,
• the selection of appropriate gaskets and fasteners,
• correct tightening according to the vehicle manufacturer's recommendations.

Careful installation reduces the risk of leaks, exhaust blow-by, and unwanted noises. A properly installed manifold also supports the correct operation of lambda sensors and other engine control elements, which translates into stable engine performance.

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, connecting sections, or mounting elements, check the available parts in the Mercedes Exhaust manifolds category.

To better understand the impact of the manifold on performance, acoustics, and the durability of the entire exhaust system, it is worth checking out practical tips and application examples – you will find them in the article Performance exhaust system: used manifolds and sports catalytic converters on the road, which discusses, among other things, the selection of used manifolds for popular brands, including Mercedes.