Mercedes W447 Cover Wheel Rear Right O/S Liner Housing Insulation A4476840677

Mercedes W447 Rear Right Wheel Arch Liner A4476840677 is an original body part from the Mudguards group, designed for the rear right side of the vehicle. This type of liner effectively protects the interior of the wheel arch from water, mud, and minor mechanical damage, supporting the durability of suspension and body components. Thanks to its factory fit for Mercedes W447 models, installation is precise and requires no modifications.

Specifications and technical data

• SKU: A4476840677
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4476840677
• Substitutable numbers: A4476840677, A 447 684 06 77
• Location on the vehicle: Rear, Right
• Category: Splash Guards & Mud Flaps

Purpose and Function of the Wheel Arch Liner

The presented wheel arch liner is designed for installation in the rear right part of the vehicle, in the wheel area. Its purpose is to limit direct contact of body and suspension components with water, road salt, and debris thrown up by the tires. A properly selected liner helps reduce the risk of corrosion, protects wiring and mountings, and improves the acoustic performance of the suspension by reducing noise from the wheel arch.

Compatibility with Mercedes W447

The part has been developed specifically for the Mercedes W447 platform, meaning it retains the factory geometry, mounting points, and appropriate rigidity. Thanks to this, the liner works with original body mountings and does not require additional adapters. Such a fit is particularly important in commercial and passenger vehicles used intensively, where quick, predictable component replacement is crucial.

Characteristics of the Used Part

The wheel arch liner comes from secondary circulation, allowing for a favorable purchase cost while maintaining the original manufacturer's specifications. A used OEM component usually integrates better with the existing body structure than universal aftermarket replacements, which translates to stable mounting and proper adhesion to the wheel arch edge. This is a practical solution for workshops and users who expect a factory fit within a reasonable budget.

Benefits of Using an Original Wheel Arch Liner

The use of a dedicated liner in the rear right part of the body affects several key areas of vehicle operation:

• protection of suspension and body components against water, mud, and road salt,
• reduction of dirt accumulation in the wheel arch space,
• maintenance of factory aerodynamics and airflow within the wheel arch,
• stable mounting due to compliance with original mounting points,
• easier inspection of the technical condition of components hidden behind the liner.

Practical Application in Servicing

Replacing a damaged or missing wheel arch liner is recommended wherever there are signs of corrosion in the wheel arch area, visible dirt on installations, or unnatural noise coming from the rear of the vehicle. For the Mercedes W447, a correctly chosen liner helps maintain the integrity of the body structure, which is important for both durability and subsequent resale value. This solution is particularly useful for fleet vehicles, vans, and family cars that frequently operate in challenging road conditions.

If you are planning a comprehensive repair or upgrade of the wheel arch area in your Mercedes and need other parts from the same group, such as liners, mudguards, or additional splash guards, check the available parts in the Mercedes Mudguards category.

To better plan service work and understand how using used OEM parts affects vehicle downtime in the workshop, it is worth reading the article Immediate Availability of Car Parts vs. Repair Time – How Used OEM Parts Shorten Workshop Stays?.