Adblue Neck Mercedes ML W166 Diesel OM642 Additive Filler Pipe A1664701720

Adblue Neck Mercedes ML W166 Diesel OM642 Additive Filler Pipe is an original fuel system component designed for OM642 diesel engines. It ensures a tight and stable routing of the AdBlue medium to the tank, supporting the proper operation of your Mercedes' exhaust emission reduction system. This is a practical service solution for users who want to restore full system functionality without the need for costly replacement of the entire module.

Specifications and technical data

• SKU: A1664701720
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1664701720
• Substitutable numbers: A1664701720, A 166 470 17 20
• Fuel type: Diesel
• Category: Fuel Tanks & Filler Necks

Purpose and function in the fuel system

The described Adblue Neck Mercedes ML W166 Diesel OM642 Additive Filler Pipe is a component from the Fuel tanks and filler pipes group, working in conjunction with the diesel fuel system. It is responsible for safely delivering the AdBlue solution to the tank, minimizing the risk of leaks and the ingress of contaminants into the system.

In combination with a properly functioning tank and equipment, this component supports:

• stable dosing of the additive in the exhaust system,
• compliance with exhaust emission standards,
• trouble-free AdBlue refilling during vehicle operation.

Construction and fitment for Mercedes ML W166

The Adblue Neck Mercedes ML W166 Diesel OM642 Additive Filler Pipe has been designed for the specific body architecture and fuel system of this model, which translates into proper hose routing, correct mounting points, and compatibility with the factory tank. As a result, installation is straightforward, without the need for structural modifications.

Its original Mercedes origin ensures the maintenance of factory diameters, shape, and geometry, which is essential for connection tightness and the durability of the entire filler path. For workshops and users, this means predictable installation and the certainty that the component will work with other system parts.

Characteristics of the used component

The presented filler pipe belongs to the group of used OEM parts, which in practice means factory-grade fitment while offering savings compared to a new component. This type of solution is particularly beneficial for maintenance repairs where maintaining the vehicle's original technical specifications is crucial.

By choosing an original, used component, you gain:

• compatibility with the factory diesel fuel system,
• preservation of the hose geometry designed by the manufacturer,
• a reasonable compromise between repair cost and build quality.

To better understand the benefits of using original components, it is worth reading the material describing the importance of OEM parts and their impact on vehicle safety and durability: why used original OEM car parts are a safe choice.

Significance for the fuel and AdBlue system

Although the Adblue Neck Mercedes ML W166 Diesel OM642 Additive Filler Pipe is not a classic fuel line, it operates in the immediate vicinity of components responsible for powering the diesel engine. Its tightness and correct routing affect the convenience of vehicle maintenance, reducing the risk of spilling the medium and potential damage to other components in the filler area.

If you want to broaden your knowledge of how the entire fuel system functions – from the tank, through pumps, to injectors – the following technical guide will be helpful: fuel system – construction, diagnostics, and selecting parts by OEM numbers.

Comprehensive service of the filler area in a Mercedes

If you are planning a comprehensive repair or upgrade of the fuel and additive filler area in your Mercedes and need other elements from the same group, such as filler hoses, connectors, or tank components, check the available parts in the Mercedes fuel tanks and filler pipes category.

In summary, the Adblue Neck Mercedes ML W166 Diesel OM642 Additive Filler Pipe is a practical service solution for OM642 engine users who want to restore proper AdBlue system operation while maintaining factory standards of quality and fitment.