Timing Shaft Mercedes W203 A209 W211 M112 Balancing Camshaft A1120302772

Mercedes A209 M112 Camshaft A1120302772 is an original part from the Camshafts group, designed for M112 series gasoline engines installed in Mercedes A209 models. The precise lobe geometry and adherence to factory camshaft tolerances ensure stable engine operation and correct valve control across the entire RPM range.

Specifications and technical data

• SKU: A1120302772
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1120302772
• Substitutable numbers: A1120302772, A 112 030 27 72, A1120520802, A 112 052 08 02, A1120841122, A 112 084 11 22
• Location on the vehicle: Front
• Fuel type: Petrol
• Category: Camshafts

Intended Use and Function in the M112 Engine

The presented camshaft is responsible for controlling the valve timing in the M112 gasoline engine, which directly affects cylinder filling with the mixture and efficient exhaust gas removal. Its placement at the front of the engine allows for cooperation with the timing drive and accessories responsible for synchronizing the crankshaft and valve operation.

Thanks to the appropriately selected lobe profile, the camshaft maintains correct valve opening and closing times, which translates to smooth engine operation, good running culture, and stable power and torque parameters. This is particularly important in gasoline engines, where precise valve control influences fuel consumption, emissions, and throttle response.

Benefits of Using an Original Camshaft

Using an original camshaft in the M112 engine allows for the preservation of the engine's factory operating characteristics. This part has been designed specifically for the geometry of the cylinder head, valve guides, and valve springs, which minimizes the risk of accelerated wear of cooperating components.

• maintaining factory valve operation characteristics and stable compression,
• reducing vibrations and noise in the timing area,
• better repeatability of engine operating parameters over a long service life,
• consistency with factory engine control unit settings for gasoline engines.

Choosing an original part from this group is particularly important for precise timing systems, where even minor deviations in lobe profile can lead to a drop in performance or diagnostic issues.

Installation Characteristics and Application Area

The camshaft is designed for installation at the front of the timing system in Mercedes M112 gasoline engines used in the A209 body style. The construction is prepared to work with factory timing drive components, which facilitates servicing and reduces the need for additional modifications.

Before installation, it is recommended to:

• check the condition of cooperating timing system components (lifters, rockers, guides),
• verify the correct setting of timing marks according to service documentation,
• use appropriate lubricants for the first start-up after replacement.

By maintaining the factory geometry, the camshaft can be integrated into the existing system without the need for cylinder head modifications or changes to accessories, thus reducing vehicle downtime.

Component Condition and Economic Aspect

The offered camshaft comes from the secondary market, which allows for significant cost reduction in repairs while maintaining original technical specifications. This type of solution is beneficial both from a budgetary perspective and for reducing resource consumption in the automotive industry.

If you want to better understand how the use of used components affects the environment and service costs, it is worth reading the material describing the practical benefits of the circular economy in automotive: Circular Economy in Your Garage – How Choosing Used Parts Supports the Environment and Your Wallet.

Expanding the Timing System in a Mercedes

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 additional camshafts, rockers, or lifters, check the available parts in the Mercedes Camshafts category.

Selecting parts from the same construction group allows for maintaining the technical consistency of the entire timing system, which translates to longer engine life and easier diagnostics in the future.