Mercedes CLA C117 X117 Rear Bumper Diffuser Trim Cover Panel Black A1178851225

Visual condition of the part

The product shows signs of use visible in the photos. Mercedes CLA C117 X117 Rear Bumper Diffuser Trim Cover Panel Black is an original black trim strip designed for installation in the rear section of the vehicle body. This component allows for an aesthetic finish of the bumper, improves the visual appeal of the vehicle, and helps maintain a consistent, factory-original look for the rear of the car. It is a practical solution for users who want to efficiently repair or replace a damaged diffuser panel.

Specifications and technical data

• SKU: A1178851225
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1178851225
• Substitutable numbers: A1178851225, A 117 885 12 25
• Location on the vehicle: Rear
• Category: Bumpers & Reinforcements

Purpose and function of the component

The presented diffuser trim is designed for installation in the rear body zone of the Mercedes CLA C117 and X117 models. It is responsible for covering the lower part of the bumper, aligning the body lines, and ensuring stable guidance of the bumper edge in the diffuser area. Thanks to its precise fit for this specific CLA generation, it ensures proper alignment with other bumper components. The black diffuser panel serves both protective and aesthetic roles – it reduces the visibility of chassis structural elements and helps maintain an orderly appearance of the vehicle's rear after collision repairs or the replacement of worn components.

Construction and bumper fitment

The diffuser trim has been developed as a factory body component for the Mercedes CLA, which translates into compatibility with the bumper line, correct mounting points, and predictable behavior during installation. The panel's design enables proper guidance of the bumper edge in the lower section, as well as integration with other rear body trim elements. The black finish blends well with standard bumpers, and when installed correctly, it helps restore a consistent look to the rear of the car after repairs. Using an original panel reduces the risk of fitment issues typical of aftermarket parts with universal geometry.

Installation characteristics

The diffuser is intended for installation in the rear part of the vehicle, in the lower bumper zone. The component's design is prepared to work with the factory mounting points in the CLA C117 / X117 bumper, which facilitates workshop work and reduces installation time. Proper seating of the panel affects the stability of the entire bumper and limits the occurrence of play and unwanted vibrations while driving. Due to its fitment for a specific body generation, the panel is particularly useful for post-accident repairs, replacing a damaged diffuser, or restoring the vehicle to a factory-like state after styling modifications.

Condition and service application

The offered component comes from the Bumpers and reinforcements category, meaning it is designed to work in an area exposed to external factors and operational loads. A used component of this type is a reasonable choice for repairs where maintaining original geometry and compatibility with factory mounts is crucial, while simultaneously optimizing service costs. Using an original diffuser trim in good technical condition allows for maintaining the correct body line flow, which is important both from an aesthetic point of view and for the proper assembly of adjacent bumper elements and underbody shields.

Complementary Mercedes body components

If you are planning a comprehensive repair or upgrade of the bumper zone in your Mercedes and need other elements from the same group, such as lower reinforcements, additional trim strips, or bumper covers, check out the available parts in the Mercedes Bumpers and reinforcements category.