AdBlue Filler Cap Mercedes W164 W212 W221 W251 Tank Cover A2516804218

Mercedes W164 W212 W221 W251 Adblue Filler Cap A2516804218 is an original part from the Fuel Filler Flaps and Caps group, designed for fuel systems in Mercedes vehicles with gasoline engines. Its carefully engineered design ensures a tight seal for the filler neck, stable system operation, and safe daily vehicle use.

Specifications and technical data

• SKU: A2516804218
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2516804218
• Substitutable numbers: A2516804218, A 251 680 42 18, KZ
• Fuel type: Petrol
• Category: Fuel Tank Caps

Purpose and Technical Function

The AdBlue filler cap in this model is responsible for maintaining the proper seal of the filler system, protecting it from external contaminants, and stabilizing pressure within the tank. A correctly selected component from this group minimizes the risk of moisture, dust, or small particles entering the system, which is crucial for the durability of fuel components and the proper functioning of the engine.

The product is dedicated to gasoline-powered Mercedes vehicles, ensuring compliance with the manufacturer's factory requirements regarding fuel parameters and system design.

Compatibility and Fit for Mercedes Models

The discussed cap has been designed for selected generations of Mercedes W164, W212, W221, and W251. This means its geometry, mounting method, and sealing characteristics are adapted to the factory filler necks used in these body styles. As a result:

• it ensures a secure fit in the filler neck socket,
• it minimizes the risk of leaks due to misalignment,
• it maintains consistency with the manufacturer's original design line.

The part comes from the Mercedes brand, which promotes technical consistency with other fuel system components and facilitates part identification by OEM data.

Performance Characteristics and Installation Benefits

As a component from the Fuel Filler Flaps and Caps category, the AdBlue filler cap plays an important operational role. A correctly selected and functional component of this type helps to:

• maintain the appropriate level of filler neck seal while driving and stationary,
• reduce medium evaporation and the impact of atmospheric conditions,
• keep the filler area tidy and facilitate refueling operations.

The nature of the part allows for an economical restoration of system functionality while maintaining the original manufacturer's specifications. It is a practical solution in case of damage, mechanical wear, or loss of the factory cap.

Selection by Technical Data and Expert Support

When selecting a filler cap for a specific vehicle, it is advisable to use OEM designations and interchangeable part numbers, which increases confidence in compatibility with the given model and year. This data is particularly useful when comparing parts from different production series or equipment versions.

To better understand the relationships between fuel system components, their identification, and their impact on vehicle operation, a specialized guide on fuel systems – injectors, pumps, and fuel tanks, including selection by VIN and OEM, diagnostics, and repair – may be helpful: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair.

Expanding Work in the Mercedes Fuel Filler Area

If you are planning a comprehensive repair or upgrade of the fuel filler area in your Mercedes and need other parts from the same group, such as additional caps, flaps, or filler neck covers, check the available parts in the Mercedes Fuel Filler Flaps and Caps category.

For work involving other body parts or areas of the car body, it is worth considering the use of proven used parts from dismantling, which allow for cost optimization without compromising the original manufacturer's specifications – you can find more on this topic in the article: Replacing Body Parts with Used Ones – Can Dismantled Sheet Metal Parts Look Like New?.