Mercedes-Benz ML W164 GL X164 Air Duct Rear Trim Panel Cover A1646842918

Mercedes-Benz ML W164 GL X164 Air Duct Rear Trim Panel Cover for Mercedes ML-Class W164 and GL-Class X164 models is an original interior trim component designed for installation in the rear of the vehicle. Thanks to its factory-spec fitment, it ensures a cohesive cabin appearance while maintaining proper airflow to rear passengers. It is a practical solution for users who want to restore the factory interior configuration in a technically correct and aesthetically pleasing manner.

Specifications and technical data

• SKU: A1646842918
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1646842918
• Substitutable numbers: A1646842918, A 164 684 29 18, BG
• Location on the vehicle: Rear
• Category: Floor Mats, Carpets & Boot Liners

Purpose and fitment for Mercedes ML W164 / GL X164

The presented component is dedicated to the rear interior section of Mercedes ML-Class W164 and GL-Class X164 SUVs. As a component from the floor and trunk trim group, it works with the factory ventilation system, covering the air duct and integrating it with the rear trim panel. This solution allows for maintaining interior stylistic consistency and proper air circulation for passengers in the second and potentially third row of seats.

Thanks to a design compliant with manufacturer standards, installation is carried out using original mounting points, without the need for modifications or "forced" fitting. This is particularly important in premium vehicles, where precise fitment of upholstery elements affects both comfort and interior acoustics.

Function of the air duct and rear trim panel cover

The Mercedes-Benz ML W164 GL X164 Air Duct Rear Trim Panel Cover serves two key functions:

• it directs the airflow from the air conditioning/heating system to the rear cabin zone,
• it masks and protects the duct against mechanical damage and dirt.

This combination of technical and finishing functions helps maintain visual order and reduces the risk of accidental damage to the air duct by luggage or passengers' shoes. The properly shaped geometry of the duct supports even air distribution, which translates into stable thermal comfort in the rear of the cabin.

Characteristics of the used component

The offered component comes from dismantling, which means it is an original Mercedes part that has already been in service in a vehicle. This type of part retains its factory geometry, correct mounting points, and compatibility with other interior trim elements. For many users, this is a favorable alternative to replacements, especially in the case of finishing elements and air ducts, where precise fitment to a specific body version is essential.

Choosing a used OEM component is often an economical solution, allowing for the restoration of full functionality of the rear ventilation system while maintaining the high quality of workmanship characteristic of the Mercedes brand. If you have doubts about whether a used or refurbished part is a better choice, it is worth checking our guide: Refurbished or used original – which part to choose for repairs?

Application in the rear zone and passenger comfort

The placement of the element in the rear of the vehicle means it has a direct impact on the comfort of passengers traveling in the back. A properly installed air duct with trim panel cover:

• stabilizes airflow in the rear cabin zone,
• limits drafts and uncontrolled air leaks from the system,
• protects ventilation ducts from damage during daily use.

As a result, the rear interior remains tidy, and the air conditioning system can operate according to the manufacturer's specifications. This is particularly important on longer trips, where even air distribution affects the comfort of all passengers.

Expanding the trunk and interior area of your Mercedes

If you are planning a comprehensive repair or upgrade of the trunk and floor area in your Mercedes and need other elements from the same group, such as liners, floor mats, or protective trays, check the available parts in the category Mercedes trunk liners, floor mats, and trays.