Mercedes W221 Rear Evaporative System Line Additive Line A2214704164

Mercedes W221 Rear Evaporative System Line Additive Line is an original fuel system component designed for installation in the rear section of the vehicle. It ensures proper routing of fuel vapors within the system, which supports stable system operation and reduces the risk of leaks. Thanks to its factory origin from the Mercedes range, you maintain structural consistency and compliance with the manufacturer's specifications.

Specifications and technical data

• SKU: A2214704164
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2214704164
• Substitutable numbers: A2214704164, A 221 470 41 64
• Location on the vehicle: Rear
• Category: Other Exhaust & Emission Parts

Purpose and function in the vehicle

The described line is a component of the rear fuel evaporative system in the Mercedes S-Class W221 generation. It is responsible for the safe discharge and routing of fuel vapors within the rear zone of the vehicle, which is important for both the correct operation of the system and the maintenance of appropriate emission parameters.

Its location in the rear of the body allows for a direct connection to fuel tank elements and other components of the evaporative system. As a result, the line works in conjunction with factory sensors and valves, maintaining the flow characteristics designed by the manufacturer.

Benefits of using an original Mercedes component

Using an original evaporative system line in a Mercedes W221 translates into a number of practical benefits:

• preservation of the factory routing geometry of the lines in the rear of the vehicle,
• proper cooperation with standard brackets and mounts,
• material consistency with other fuel system components,
• reduction of the risk of leaks resulting from the mismatch of aftermarket replacements.

Thanks to this, you maintain the operating parameters of the evaporative system at the level intended by the manufacturer, which is important from both an operational and service diagnostics perspective.

Installation and operational characteristics

The line is designed for installation in the rear zone of the vehicle, in the location factory-provided by the manufacturer. The design, tailored to the specific W221 platform, facilitates proper routing of the line and connection to adjacent evaporative system components.

The item comes from disassembly, which allows for economical repair while maintaining the original specification. The used OEM component is a good solution in situations where the priority is compatibility with the factory installation and cost reduction compared to new parts.

Application in diagnostics and repair of the evaporative system

The rear evaporative system line is often replaced in the event of:

• detecting leaks within the rear part of the fuel system,
• mechanical damage to lines in the vicinity of the tank,
• problems with maintaining the tightness of the evaporative system detected during computer diagnostics.

Replacing it with an original component allows for restoring proper tightness and flow parameters, which facilitates subsequent diagnostics and eliminates errors related to the evaporative system.

Offer expansion and additional materials

If you are planning a comprehensive repair or upgrade of the rear zone in your Mercedes and need other elements from the same group, such as lines, connectors, or additional fuel system lines, check the available parts in the Other Mercedes category.

For a comparison of design solutions used in sports versions of other brands and a better understanding of the differences in the construction of powertrains and their accompanying installations, it is worth reading the article on the Global Parts blog: Audi RS vs other models – what is hidden under the hood and chassis?.