Mercedes W203 S203 CL203 Petrol Engine Oil Sump Pan R1120141203

The Mercedes W203 S203 CL203 Gasoline Oil Pan R1120141203 is an original lubrication system component designed for gasoline engines paired with automatic transmissions. Thanks to its factory geometry and precise casting, it ensures stable engine operating conditions, proper oil accumulation, and correct oil pump supply. This is a practical solution for users who want to restore the full functionality of the lubrication system while maintaining high compatibility with the factory specification.

Specifications and technical data

• SKU: A1120101328
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1120101328
• Substitutable numbers: A1120101328, A 112 010 13 28, R1120141203, R 112 014 12 03
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Oil Sumps

Purpose and Compatibility

The presented oil pan is dedicated to Mercedes vehicles from the W203, S203, and CL203 series with gasoline engines working with an automatic gearbox. The oil pan's construction is adapted to the powertrain of these models, allowing for the maintenance of the correct oil level, proper mounting point placement, and appropriate routing of drainage channels.

The component has been designed to maintain the factory operating parameters of the lubrication system, including proper oil collection from the lower part of the block, stabilization of the oil level during acceleration, braking, and cornering, and compatibility with original seals and accessories.

Construction and Technical Function

The oil pan in this series plays a key role in the gasoline engine lubrication system, responsible for:

• storing an adequate amount of working oil,
• ensuring proper oil suction by the pump,
• draining impurities to the area where they can be captured by the filter,
• cooperating with the oil cooling system through its appropriately shaped outer surface.

The oil pan's geometry is adapted to the chassis and engine accessories, which reduces the risk of collision with other elements and facilitates servicing. Precise fit to the engine block allows for the use of standard seals and mounting bolts, simplifying installation and reducing vehicle downtime.

Benefits of Using an Original Oil Pan

Using a dedicated oil pan in Mercedes W203, S203, and CL203 models brings tangible operational benefits:

• maintaining stable oil pressure across the entire RPM range,
• reducing the risk of lubrication system air ingress during dynamic driving,
• proper heat dissipation from the oil thanks to the optimized oil pan surface,
• maintaining compatibility with factory mounting points for covers and associated components.

For users seeking a service solution that does not require modifications or adaptations, an original oil pan is a practical choice for restoring proper lubrication system operation after damage or wear of the previous component.

Characteristics of the Used Component

The offered oil pan is categorized under Oil Pans and is a used item, which translates to a favorable cost-to-functionality ratio while maintaining the factory design. This type of part is particularly attractive for collision repairs, replacement after mechanical damage, or restoring the functionality of a daily-driven vehicle.

Before installation, standard servicing procedures are recommended, such as checking the mating surface, selecting a new seal, and verifying the condition of the mounting threads. A properly prepared and installed oil pan ensures long-term, stable operation of a gasoline engine with an automatic transmission.

Expanding the Lubrication System in a Mercedes

If you are planning a comprehensive engine area repair or upgrade for your Mercedes and need other components from the same group, such as additional sumps, covers, or mounting elements, check the available parts in the Mercedes Oil Pans category.

If you are simultaneously considering improving cabin ergonomics and driving comfort, it's worth considering replacing seats with branded used parts – you'll find more practical tips in the article Interior Metamorphosis: How Used Seats Affect Comfort and Car Value.