Mercedes W204 Gearbox Oil Line Left N/S Oil Cooler Pipe Hose Petrol A2042702796

Mercedes W204 Gearbox Oil Line Left N/S Oil Cooler Pipe Hose Petrol is a specialized drivetrain component designed for use with the automatic transmission in petrol-powered vehicles of this series. It is responsible for the safe routing of transmission oil on the left side of the vehicle, which is crucial for the stable operation of the gearbox and maintaining proper lubrication parameters. This is a practical service solution for users looking to restore proper oil circulation in their automatic transmission.

Specifications and technical data

• SKU: A2042702796
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2042702796
• Substitutable numbers: A2042702796, A 204 270 27 96, BG
• Location on the vehicle: Left
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Transmission Sensors

Purpose and function in the drivetrain

The gearbox oil line on the left side is responsible for transporting the lubricating and cooling medium between the automatic transmission and other system components. In W204 series petrol vehicles, it ensures:

• stable oil flow within the automatic transmission's operating circuit,
• maintenance of proper pressure in the oil channel,
• reduction of the risk of transmission overheating during city and highway driving.

Thanks to its precise fit for the W204 model design, the line works with the factory mounting system, which facilitates installation and reduces vehicle downtime at the workshop.

Compatibility with the automatic transmission system

The component has been designed to work with the automatic transmission in petrol-powered cars, allowing for compliance with the factory operating parameters of the gearbox. Its placement on the left side of the vehicle ensures correct oil line routing in accordance with the manufacturer's original design.

Such a fit is particularly important in automatic transmissions, where stable pressure and proper oil flow translate into smooth gear changes, refined operation, and the durability of the entire drivetrain.

Benefits of using an original oil line

Using a line dedicated to the W204 series helps reduce common issues related to leaks and pressure drops in the transmission oil system. In practice, this means:

• more predictable automatic transmission operation during startup and warm-up,
• reduced risk of slipping and jerking during gear changes,
• better protection of internal transmission components against excessive wear.

For the user, this translates into more stable gearbox performance and the ability to continue operating the vehicle without the need for costly repairs to the entire assembly.

Product characteristics and service application

The gearbox oil line on the left side is a solution intended primarily for service and repair applications in Mercedes W204 series vehicles. It is effective for:

• eliminating oil leaks around the automatic transmission lines,
• comprehensive maintenance of the transmission oil system,
• restoring the factory oil flow path after bodywork repairs or the replacement of other components in the drivetrain area.

By maintaining the original geometry of the line, it is possible to keep the oil line routing correct, which is important for both safety and the durability of components adjacent to the gearbox.

Technical support and additional materials

To better understand the specifics of transmission operation and typical signs of wear, it is worth checking out the guide on choosing and operating transmissions, available in the article Gearbox: manual, automatic, or DSG – common faults and a guide to buying a used transmission. This is a practical supplement to your knowledge when planning repairs or diagnostics for the automatic transmission in your car.

If you are planning a comprehensive repair or upgrade of the gearbox area in your Mercedes and need other components from the same group, such as oil lines, sensors, or associated parts, check out the available parts in the category Mercedes transmission sensors.