Mercedes R171 R172 W204 W212 C218 Lock Ring Fuel Tank Sealing Ring A1714710110

The Mercedes Fuel Tank Seal Ring is a precision mounting component designed for the fuel system of selected Mercedes models, including the R171, R172, W204, W212, and C218 series. Its original design ensures stable mounting of the fuel module and a leak-proof connection to the tank, which directly impacts the safety and proper operation of the entire fuel supply system.

Specifications and technical data

• SKU: A1714710110
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1714710110
• Substitutable numbers: A1714710110, A 171 471 01 10
• Category: Other Air & Fuel Delivery

Purpose and Function in the Fuel System

The presented fuel tank seal ring has been designed as a mounting and sealing element for the fuel module in Mercedes compact and mid-size cars, including R171/R172 roadsters and W204, W212, and C218 sedans and coupes. Its function is to:

• maintain constant pressure of the fuel module against the tank flange,
• ensure a sealed connection in the service cap area,
• limit the risk of fuel vapor leaks,
• stabilize the position of internal tank components during operation.

Thanks to its precise fit into factory mounting sockets, installation is predictable and repeatable, without the need for modifications or additional adapters.

Original Origin and Compatibility

This ring is an original Mercedes component, meaning it adheres to factory dimensional tolerances and complies with the manufacturer's service documentation. The element is particularly important for:

• replacing the fuel pump or the entire fuel module,
• repairs related to tank leaks,
• professional servicing of Mercedes vehicle fuel systems.

Choosing an original seal ring helps maintain the structural integrity of the fuel system and reduces the risk of fitment issues, which are common with aftermarket parts of uncertain origin.

Characteristics of a Used Component

The offered seal ring is a used part, making it an attractive cost-effective alternative while retaining the original manufacturer's specifications. This type of component, when properly maintained, does not undergo intensive mechanical wear, so in many cases, it can be reused in the servicing process.

Opting for a used OEM part is particularly beneficial when the priority is to maintain the original geometry and connection rigidity, while simultaneously optimizing the repair or vehicle upgrade budget.

Professional Service Application

The fuel tank seal ring is used in both authorized dealerships and independent workshops specializing in the Mercedes brand. This element is crucial for any intervention in the upper part of the fuel tank, where resealing the fuel module after its removal is required.

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other parts from the same group, such as fuel pump modules, service covers, or additional flange seals, check the available parts in the Other Mercedes category.

Technical Support and Knowledge of Performance Drivetrains

For those interested in the broader context of German drivetrain designs, including differences in engine, brake, and chassis construction, an article comparing performance versions with standard models may be helpful. More information can be found in the material: Audi RS vs. Other Models – What Lies Under the Hood and Chassis?, which helps to better understand manufacturers' approaches to designing key components.