Mercedes W447 AdBlue Cap Ad Blue Tank Filler Cover A0004706105

Mercedes W447 AdBlue Cap Ad Blue Tank Filler Cover is an original component from the Fuel filler flaps and caps group, designed for the AdBlue system in Mercedes vehicles. The blue finish facilitates quick identification of the filler point, and its factory origin ensures a proper fit for the tank thread and housing.

Specifications and technical data

• SKU: A0004706105
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0004706105
• Substitutable numbers: A0004706105, A 000 470 61 05
• Color: Blue
• Category: Fuel Tank Caps

Purpose and technical function

The AdBlue tank cap in Mercedes W447 models is responsible for tightly sealing the urea solution filler, which limits the risk of contaminants entering the system and minimizes fluid evaporation. A correctly selected cap supports the stable operation of the SCR exhaust emission reduction system, thereby helping to maintain the vehicle's compliance with emission standards.

The component from this group is designed to:

• ensure proper sealing of the connection with the filler neck,
• maintain correct pressure and protection against dirt,
• operate seamlessly within the vehicle's typical operating temperature ranges.

Construction and functional features

The blue color of the cap is characteristic of AdBlue systems and allows for intuitive differentiation from the standard fuel filler. This reduces the risk of errors during vehicle maintenance, which is important both in daily use and in fleet conditions.

The original design ensures:

• consistency with the factory geometry of the filler in the Mercedes W447,
• compatibility with the thread and seal specified by the manufacturer,
• stable fastening during repeated unscrewing and tightening.

Condition and service application

The offered cap is a used item, making it an attractive solution for vehicle servicing when the priority is cost optimization while maintaining original specifications. This type of part is suitable for replacing a damaged, cracked, or leaking cap, as well as in situations where the previous component has been lost.

Replacing the AdBlue tank cap is usually a simple service operation that does not require interference with other system components. A correctly selected element allows for the quick restoration of full filler functionality and safe continued vehicle operation.

Integration with the fuel and AdBlue system

Although the AdBlue cap belongs to the Fuel filler flaps and caps group, in practice, it works with a separate tank and installation responsible for dosing the urea solution into the exhaust system. Its tightness and proper operation have an impact on protecting the interior of the tank from moisture, dust, and other contaminants that could disrupt the operation of the AdBlue pump or injector.

For users who want to better understand the relationships between the tank, pump, and service components, a guide on the diagnostics and operation of the fuel supply system will be helpful – detailed information can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

Expanding service for the filler area in Mercedes

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

Why choose this AdBlue cap

Choosing an original AdBlue tank cap for the Mercedes W447 is a way to maintain consistency with the vehicle's factory design and reduce the risk of operational problems resulting from mismatched replacements. The blue marking, in accordance with the accepted standard for AdBlue, improves service ergonomics, and the use of a component from the same design group facilitates future service and diagnostics.