Mercedes CLA C117 Side Air Module Rear Left N/S Unit A1178600702

Mercedes CLA C117 Side Air Module Rear Left N/S Unit is an original safety component designed for installation in the rear left part of the vehicle body. As a component of the rear seat passenger protection system, the airbag provides precisely engineered side protection, consistent with the factory safety concept of Mercedes. This is a solution for users who want to maintain the structural integrity of the vehicle and use OEM components instead of replacements of unknown origin.

Specifications and technical data

• SKU: A1178600702
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1178600702
• Substitutable numbers: A1178600702, A 117 860 07 02
• Location on the vehicle: Rear, Left
• Category: Additional Seat Parts

Purpose and function in the vehicle

The described airbag is a component installed in the rear left area of the cabin, working in conjunction with factory crash sensors and the SRS system controller. Its task is to deploy rapidly in the event of a side collision and reduce the forces acting on passengers sitting in the back. By maintaining the original geometry and mounting points, the component remains consistent with the seat structure and side upholstery panels.

Proper fitment to the specific CLA C117 body version allows for the maintenance of the airbag deployment zone intended by the manufacturer, which is crucial for protection effectiveness. Using an original component reduces the risk of compatibility issues with the wiring harness, connectors, and the safety system controller.

Benefits of using an original airbag

Choosing an element such as Mercedes CLA C117 Side Air Module Rear Left N/S Unit allows for the preservation of the vehicle's safety system integrity. The original design ensures:

• factory fitment to the seat and side interior panels,
• compatibility with the operating parameters of the SRS controller,
• correct positioning of inflation zones relative to the passenger's silhouette,
• consistency with other safety system elements in the vehicle.

As a result, the user gains confidence that after replacement, the manufacturer's design assumptions will be maintained, and the passenger protection system will function in a predictable manner.

Installation and operational characteristics

The airbag is intended for installation in the rear left part of the vehicle, which facilitates the identification of the correct mounting location during service work. The design, intended for use with factory mounts and the electrical harness, allows for maintaining an orderly cable routing and correct positioning of the module relative to the seat upholstery and the side interior.

During installation, it is recommended to follow service procedures dedicated to SRS systems, including disconnecting the vehicle's power supply and verifying the correctness of connections with the installation. This minimizes the risk of system operation errors and avoids the appearance of warning messages on the instrument cluster.

Why choose a used OEM element

The airbag belongs to the Other seat parts group, but it plays a key role in the area of passive safety. The used version allows for a significant reduction in repair costs compared to a new component, while maintaining the original design and fitment. This solution is particularly beneficial for comprehensive post-accident repairs, where several safety system elements are replaced simultaneously.

When deciding to use reclaimed parts, it is worth paying attention to experiences from other safety component groups. For example, when repairing the braking system, many users successfully use original, used elements, which has been described in more detail in the article: Brake calipers under the microscope – how to safely reduce repair costs by choosing proven reclaimed parts. An analogous approach – a reasonable selection of original components – can be applied when planning repairs of safety systems in a Mercedes.

Expanding seat zone upgrades in Mercedes

If you are planning a comprehensive repair or upgrade of the seat zone in your Mercedes and need other elements from the same group, such as rails, mounts, or additional modules related to the seats, check the available parts in the Other Mercedes seat parts category.