Mercedes-Benz C-Class W202 Fuel Tank Filler Rubber Seal Grommet A2029970281

Mercedes-Benz C-Class W202 Fuel Tank Filler Rubber Seal Grommet is a precision component from the Fuel tanks and filler pipes category, responsible for the tight seating of the filler neck in the vehicle body. A properly selected rubber ring limits the ingress of moisture, dirt, and fuel vapors into the bodywork, supporting the safe and stable operation of the fuel system. This is a practical service solution for owners of C-Class W202 models who want to maintain proper sealing around the fuel filler area.

Specifications and technical data

• SKU: A2029970281
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2029970281
• Substitutable numbers: A2029970281, A 202 997 02 81, EM
• Category: Fuel Tanks & Filler Necks

Function and application in the fuel system

The rubber fuel filler ring in the Mercedes C-Class W202 acts as a seal between the filler pipe and the body panel. The precisely selected geometry of the seat ensures stable positioning of the pipe, reduces vibrations, and minimizes the risk of leaks in the filler zone.

Using the correct seal in this location helps to limit:

• the ingress of water and contaminants into the space around the filler,
• contact of fuel and vapors with body components,
• accelerated corrosion in the area of the filler seat.

As a result, the fuel system maintains stable operating conditions, and the filler area remains better protected against external factors.

Compatibility and part selection

The presented seal is a component intended for Mercedes-Benz C-Class W202 generation models, belonging to the assembly group related to the fuel filler and tank. It is always worth confirming the selection of the part based on the vehicle's service documentation or the manufacturer's numbering to ensure a correct fit for the specific body version and the filler pipe used.

A properly selected component:

• facilitates installation without the need for modifications,
• ensures proper adhesion to the bodywork,
• reduces stress in the connection zone between the filler pipe and the tank.

For users who service the fuel system comprehensively, it is important that the seal works with the original filler pipe and tank, which translates into the durability of the entire connection.

Material and performance characteristics

The rubber fuel filler ring operates in a demanding environment – it is exposed to contact with fuel vapors, temperature changes, and moisture. The use of an appropriate elastomer allows it to maintain flexibility and tightness over a long period of use, while simultaneously damping vibrations transmitted from the body to the filler pipe.

The main advantages of this design include:

• elastic fit to the shape of the pipe and the opening in the body,
• compensation for minor deformations resulting from bodywork movement,
• reduction of vibration transmission to fuel system components.

Thanks to this, the fuel filler zone remains mechanically stable, and the risk of micro-cracks or looseness in the connection is reduced.

Component condition and installation aspects

The offered seal is a dismantled part, which allows for an economical restoration of the seal in the fuel filler zone while maintaining the original geometry of the component. During installation, it is recommended to thoroughly clean the seat in the body and the filler pipe so that the contact surfaces are free of rust, old sediment, and residues of the previous seal.

During installation, it is worth paying attention to:

• correct positioning of the ring in the body opening,
• absence of twists or folded rubber edges,
• even pressure of the filler pipe against the seat.

Such an installation process helps ensure that the connection remains tight and stable for a long time, without the need for additional adjustments.

Fuel system service expansion and technical knowledge

When working around the fuel filler, it is worth looking at the entire system as a whole – from the cap, through the filler pipe, to the tank and engine supply components. For those who want to better understand the relationships between individual components, a guide describing the diagnostics, selection, and operation of supply elements will be useful. A detailed discussion can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, where practical service tips and answers to the most frequently asked questions are presented.

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