Mercedes W176 W246 C117 W639 Engine Diesel Fuel Filter A6420906352

Mercedes W176 W246 C117 W639 Engine Diesel Fuel Filter is a precision fuel system component designed for use with Diesel fuel. As part of the Fuel filters category, it is responsible for effectively cleaning diesel fuel, which translates into stable engine performance and protection of injectors against contamination.

Specifications and technical data

• SKU: RHD-A6420906352
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420906352
• Fuel type: Diesel
• Category: Fuel Filters

Purpose and function in the fuel system

The offered fuel filter is dedicated to Mercedes vehicles with diesel engines, in particular to popular compact and commercial models from the W176, W246, C117, and W639 series. Its task is to separate solid contaminants and deposits from diesel fuel, which supports proper system pressure and reduces the risk of premature wear of precision components, such as injectors or the high-pressure pump.

Using a properly selected fuel filter in a diesel engine is crucial for maintaining smooth engine operation, easier cold starts, and reducing power drops resulting from insufficient fuel flow.

Benefits of using an original Diesel fuel filter

The fuel filter designed for diesel units in Mercedes vehicles has been engineered for the demanding operating conditions typical of modern injection systems. The appropriate design of the filter element ensures:

• stable fuel flow at high operating pressure,
• effective capture of fine solid particles,
• reduced risk of air entering the system,
• better protection of precision components over a long service life.

As a result, the filter is a practical solution for users who expect predictable fuel system behavior and want to minimize the risk of costly repairs associated with contaminated fuel.

Product characteristics and condition

The presented fuel filter belongs to the Fuel filters category and is a dismantled part, which allows for an economical restoration of the fuel system's efficiency while maintaining compliance with factory specifications. A used component of this type is particularly attractive for routine repairs, where the priority is matching the specific model and maintaining the original geometry of the connections.

Selecting a filter that matches the OEM designation facilitates integration with the existing fuel installation, without the need for modifying hoses or mounting brackets. This is a solution that works well both for standard maintenance replacements and for repairs following a fuel system failure.

Selection, diagnostics, and operation of the fuel system

To fully utilize the potential of the offered filter, it is worth paying attention to the general condition of the fuel system – lines, pump, injectors, and tank. Regular leak checks and timely replacement of consumables reduce the risk of pressure drops, uneven engine operation, or starting problems. When selecting parts, it is helpful to use OEM designations and vehicle data, which helps avoid installation errors.

If you want to deepen your knowledge on the diagnostics and maintenance of fuel systems in diesel engines, it is worth using expert materials – practical tips regarding injectors, pumps, and the fuel tank can be found in the article "Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration", which discusses, among other things, component selection by OEM numbers and principles of proper operation.

Related Mercedes Fuel filters

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 filter cartridges, filter housings, or supply lines, check the available parts in the Mercedes Fuel filters category.