Mercedes W166 Diesel Engine AdBlue Additive Tank Fluid Reservoir A1664703901

Mercedes W166 Diesel Engine AdBlue Additive Tank Fluid Reservoir is an original component of the exhaust emission reduction additive supply system, designed for installation in Diesel engine vehicles. This used, fully functional reservoir is a practical solution for AdBlue system repairs, allowing for the efficient restoration of the exhaust gas treatment system without the need to invest in a new part.

Specifications and technical data

• SKU: A1664707201
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1664707201
• Substitutable numbers: A1664707201, A 166 470 72 01, A1664703901, A 166 470 39 01
• Fuel type: Diesel
• Category: Fuel Tanks & Filler Necks

Purpose and function in the AdBlue system

The Mercedes W166 Diesel Engine AdBlue Additive Tank Fluid Reservoir belongs to the group of components responsible for storing the additive used in SCR systems in diesel engines. Its task is to safely store the AdBlue solution and ensure a stable supply to the dosing system, which translates into the proper reduction of nitrogen oxides in the exhaust gases.

This component works in conjunction with the exhaust system equipment and engine control unit, so its efficiency has a direct impact on:

• maintaining compliance with exhaust emission standards,
• stable operation of the Diesel power unit,
• absence of error messages related to the AdBlue system,
• reducing the risk of the vehicle entering limp mode.

Technical category: Fuel tanks and filler pipes

The presented item belongs to the Fuel tanks and filler pipes category, which includes components responsible for storing and supplying operating media in the vehicle. In the case of this model, the reservoir works with the AdBlue additive supply system in Mercedes W166 family cars, making it an essential element for repairs and upgrades of the fuel and emission system in diesel-powered vehicles.

Benefits of using an original Mercedes reservoir

Choosing an original AdBlue reservoir from the Mercedes brand ensures a perfect fit for the vehicle's factory installation, without the need for modifications to mounts or hoses. As a result:

• installation is predictable and in accordance with service documentation,
• compatibility with the existing Diesel engine control system is maintained,
• the risk of leaks and system venting problems is reduced,
• the integrity of the entire Fuel tanks and filler pipes system in the given model is preserved.

The used component allows for the optimization of repair costs while maintaining the factory design and operating parameters of the AdBlue system.

Condition, verification, and service application

The offered reservoir is a used item, which in practice means it has been dismantled and verified for suitability for further use. This type of part is particularly useful in situations where:

• the original reservoir has suffered mechanical damage or corrosion,
• there are leaks in the AdBlue system,
• it is necessary to replace the complete reservoir instead of performing a costly local repair.

Thanks to the preservation of factory geometry and connections, the reservoir can be used as a direct replacement in Mercedes W166 Diesel vehicles, restoring the proper functioning of the emission reduction system.

Technical support and additional materials

To better understand the role of the reservoir in the entire supply path and the relationships between the reservoir, pump, and injection system, it is worth using the advice contained in the article: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. This material helps with diagnostics and selecting components by OEM numbers and facilitates the planning of a comprehensive repair.

If you are planning a comprehensive repair or upgrade of the supply and storage area for operating media in your Mercedes and need other elements from the same group, such as additional reservoirs, supply lines, or filler components, check the available parts in the Mercedes Fuel tanks and filler pipes category.