Fuel Pump Ring Mercedes W204 W212 Tank Lock Locking A0014711430

The Fuel Pump Retaining Ring for Mercedes W204 W212 is a precise fuel system component responsible for the secure and stable mounting of the pump module within the fuel tank. This component, part of the Fuel Pumps and Level Sensors group, ensures proper pressure is applied to the pump housing against the tank flange, thereby reducing the risk of leaks and engine operational issues. As a part designed for specific Mercedes models, it offers a functional solution for fuel system repairs and servicing.

Specifications and technical data

• SKU: A0014711430
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0014711430
• Substitutable numbers: A0014711430, A 001 471 14 30, KD
• Category: Fuel Pumps & Sending Units

Purpose and Function in the Fuel System

The fuel pump locking ring in Mercedes W204 and W212 models is responsible for mechanically securing the pump module in the tank's service opening. Its tasks include:

• maintaining constant pressure of the pump module against the tank flange,
• stabilizing the fuel pump's position during driving,
• reducing the risk of fuel tank cover leaks,
• working in conjunction with the seal between the pump housing and the tank.

Thanks to a properly selected retaining ring, the fuel supply system maintains its correct operating parameters, and system pressure is not compromised by leaks at the connection between the pump module and the tank.

Compatibility and Fitment for Mercedes W204 / W212

The presented fuel pump locking ring has been designed for use in Mercedes C-Class (W204) and E-Class (W212) vehicles, where the fuel pump module is installed from the top of the tank. The component's design is adapted to the factory-fitted socket in the tank, allowing for a secure fit and even pressure distribution.

When selecting this component, it is crucial to compare its markings with the original part and verify its compatibility with the specific body style and engine unit. In practice, this ring is used both when replacing the fuel pump itself and during repairs related to the fuel level sensor, when resealing the service opening is necessary.

Characteristics of the Used Component

The offered ring is a used part, sourced from a dismantled vehicle. For fuel system mounting components, this often represents a sensible compromise between cost and functionality. This type of component does not contain electronics or rapidly wearing parts, so as long as its geometry is intact and there are no mechanical damages, it can be successfully reused.

In practice, this allows for economical fuel system repairs while maintaining original fitment quality. It is important, however, to use appropriate tools and torque specifications during installation to avoid deforming the ring or the tank flange.

Installation and Operational Guidelines

When installing the fuel pump retaining ring in Mercedes W204 / W212, pay attention to several technical aspects:

• thoroughly clean the tank flange and the sealing surface for the gasket,
• check the condition of the seal between the pump module and the tank,
• tighten the ring evenly to avoid localized stress points,
• verify that there are no fuel leaks after installation, especially with a full tank.

A correctly installed ring ensures a stable position for the pump module and proper cooperation with the fuel level sensor, leading to predictable fuel system operation and accurate readings on the instrument cluster.

Technical Support and Part Selection

If you have any doubts regarding the selection of this part for your specific vehicle version, it is advisable to use factory markings and catalog data to avoid installation issues. For additional knowledge when working with fuel system components and vehicle electronics, you may find our blog post helpful: Used Automotive Electronics – How to Wisely Select Modules and Sensors by OEM Markings.

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and require other parts from the same group, such as pump modules, pump housings, or fuel level sensors, please check the available parts in the Mercedes Fuel Pumps and Level Sensors category.