Mercedes W204 C207 W212 M274 Fuel Line Hose High Pressure Pump A2740700081

Mercedes W204 C207 W212 M274 Fuel Line Hose High Pressure Pump is an original fuel system component designed for the M274 engine family in C-Class, E-Class, and C-Class Coupé models. As part of the Lines, hoses and pipes group, it ensures precise fuel delivery to the high-pressure pump, which translates into stable engine operation and correct injection characteristics. This is a solution for users looking for a factory fit without compromising on system safety and leak-tightness.

Specifications and technical data

• SKU: A2740700081-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2740700081
• Substitutable numbers: A2740700081, A 274 070 00 81, A 274 070 01 81, A2740700181, A 274 070 35 00, A2740703500
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The high-pressure fuel pump line in the M274 engine is responsible for transporting fuel between fuel system components under significant operating pressures. The proper geometry and internal diameter of the line are crucial for:

• maintaining the correct pressure in the fuel rail,
• stable operation of the injectors,
• limiting pressure drops during dynamic changes in engine load,
• maintaining tightness across the entire operating temperature range. Thanks to a design that complies with factory specifications, the line works with the stock high-pressure pump, maintaining the parameters intended by the vehicle manufacturer.

Compatibility with Mercedes models

The component was designed for M274 units used in popular Mercedes C-Class (W204), E-Class (W212), and C-Class Coupé (C207) models. This means that the connection geometry, line length, and routing are adapted to the factory layout of components in the engine bay. As a result, the line can be used as a replacement for the factory-installed component in vehicles where the fuel system is based on a high-pressure pump working with the M274 engine, without the need for installation modifications or additional alterations.

Benefits of using an original fuel line

Using a fuel line dedicated to a specific engine and body type brings measurable operational benefits. The most important include:

• Factory fit – proper connection angles and line length facilitate installation and minimize stress in the system.
• Appropriate pressure resistance – the design intended for operation with a high-pressure pump reduces the risk of leaks.
• Stable engine performance – proper fuel flow promotes smooth engine operation and correct injection dosage.
• Consistency with other fuel system components, which facilitates future diagnostics and service.

Product characteristics and condition

The offered line comes from a Mercedes vehicle and is a used component, which allows for an economical repair of the fuel system while maintaining the original specification. Such components are frequently chosen when servicing M274 engines, when it is necessary to replace the line due to leaks, mechanical damage, or interference with the fuel system. Thanks to the preservation of the factory design, the line can be used both for standard maintenance replacement and for work related to restoring stock parameters after previous modifications.

System expansion and additional components

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as additional fuel lines, return hoses, or supply pipes, check the available parts in the Mercedes lines, hoses and pipes category. If you are interested in a broader approach to car modernization using components from higher trim levels, it is worth checking out the retrofitting guide – you will find practical tips in the article about affordable car retrofitting using used parts.