Mercedes W176 W245 Fuel Filter OM642 Diesel Engine Housing A6420906452

Mercedes W176 W246 Fuel Filter Diesel OM642 is an original part from the Fuel Filters group, designed for diesel engines in Mercedes compact class vehicles. Thanks to its design tailored to the OM642 unit, it ensures stable operating conditions for the fuel system and helps maintain proper diesel engine performance.

Specifications and technical data

• SKU: A6420906452-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420906452
• Substitutable numbers: A6420906452, A 642 090 64 52, BG
• Fuel type: Diesel
• Category: Fuel Filters

Purpose and Role in the Fuel System

A fuel filter in a diesel engine is responsible for separating solid contaminants and water from diesel fuel, which is particularly important in modern engines with precise injection systems. The Mercedes W176 W246 Fuel Filter Diesel OM642 has been designed to meet the requirements of diesel engines, where fuel cleanliness directly impacts the durability of injectors, pumps, and the entire fuel system.

A properly selected fuel filter reduces the risk of accelerated wear of precision components, helps maintain stable fuel rail pressure, and supports smooth engine operation across the full range of loads.

Compatibility and Technical Specifications

The presented element belongs to the Fuel Filters category and is intended for Diesel fuel systems in Mercedes vehicles. The filter's design is adapted to the requirements of the OM642 engine used in the W176 and W246 models, making it easier to select parts based on manufacturer codes and vehicle data.

The product has assigned part numbers and interchangeable numbers, allowing for precise verification of compatibility with a specific car configuration, both based on service documentation and parts catalogs. This ensures the filter can be safely used as a service component in diesel fuel systems where maintaining original flow and filtration parameters is required.

Performance Characteristics and Installation

As a component of a Diesel fuel system, the filter is designed to operate under high pressure and variable temperatures, typical of modern diesel engines. The appropriate design of the housing and filter element allows for maintaining the correct fuel flow direction and proper system bleeding after replacement.

The product status is marked as used, which in practice means that standard service procedures should be considered before installation, and it should be verified whether the given element corresponds to the adopted vehicle maintenance strategy (e.g., timely replacement, fuel system diagnostics, planned regeneration of other components).

Why Choose the Right Diesel Fuel Filter

In diesel engines, the quality of fuel filtration is crucial for:

• reducing wear of injectors and high-pressure pumps,
• maintaining stable common rail system parameters,
• decreasing the risk of failures caused by water and contaminants in the fuel,
• preserving engine performance and proper starting in low temperatures.

Selecting a filter dedicated to a specific engine type, such as the OM642, supports the maintenance of original flow parameters and hydraulic resistance, which translates into predictable vehicle behavior in daily operation.

If you are planning a comprehensive repair or upgrade of the fuel system in your Mercedes and need other parts from the same group, such as filter elements, filter housings, or fuel lines, check the available parts in the Mercedes Fuel Filters category.

Technical Support and Fuel System Knowledge

To better understand the relationships between the fuel filter, injectors, and high-pressure pump, and to plan maintenance services consciously, it is worth consulting specialized materials. Practical information on diagnostics, component selection based on manufacturer codes, and operating principles can be found in the article “Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair”.

If you are considering when it is worthwhile to use a used part and when it is better to opt for an aftermarket or original part, the comparative study “Original, Aftermarket, or Used – Which Car Parts Are Most Cost-Effective?”, which discusses differences in cost, quality, and fit based on manufacturer codes, may also be helpful.