Mercedes CLA C117 Roof Curtain Left N/S Head Air Module A1178601102

Mercedes CLA C117 Roof Curtain Left N/S Head Air Module is an original passive safety system component designed for installation on the left side of the vehicle interior. As part of the Headliner and parts group, it works with factory sensors and the airbag control unit, ensuring proper deployment of the curtain in a critical moment. Using an OEM component allows for a technically correct post-collision repair while maintaining the structure intended by the manufacturer.

Specifications and technical data

• SKU: A1178601102
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1178601102
• Substitutable numbers: A1178601102, A 117 860 11 02
• Location on the vehicle: Left
• Category: Headliners & Parts

Purpose and function of the airbag curtain

The side curtain mounted in the headliner area on the left side is responsible for protecting the head and upper torso of the driver and passengers during side impacts and selected rollover scenarios. Upon activation, this element works with the pillar and roof frame structure, creating a barrier between the occupants and the vehicle's crumple zone.

Thanks to its factory geometry and dedicated shape, the curtain conforms to the body lines of the CLA C117 model, which promotes predictable inflation and stable positioning of the airbag along the windows on the left side. Proper placement of mounting points and routing of the initiation harness is crucial for maintaining the correct SRS system activation sequence.

Construction and integration with the headliner

The left-side airbag curtain is structurally integrated with the headliner area, pillars, and roof frame, which requires precise handling during installation. This component works with:

• the internal roof structure,
• pillar covers,
• headliner upholstery and trim strips.

Such a solution allows for maintaining interior aesthetics while preserving the full functionality of the safety system. Proper positioning of the curtain minimizes the risk of twisting or folding, which is essential for correct deployment in an emergency situation.

Benefits of using an original airbag curtain

Using an original component dedicated to the CLA C117 model ensures:

• full compatibility with the factory SRS controller and collision sensors,
• preservation of the manufacturer-intended inflation characteristics and response time,
• proper fitment to the headliner and pillar structure on the left side of the vehicle,
• the ability to restore the factory safety configuration after a post-accident repair.

For the user, this means a technically correct repair without the need for adaptations or modifications to the mounts, which is particularly important for components responsible for protecting life and health.

Condition, installation, and service recommendations

The offered airbag curtain is a used component, which allows for an economical yet vehicle-compliant replacement of a damaged part. Before installation, it is recommended to verify the SRS installation, connectors, and the control unit for any errors stored in the system memory.

Due to the nature of the airbag, installation should be carried out by a qualified service center with experience in working with safety systems. Correct positioning of the curtain, proper tightening of the mounts, and inspection of the wiring harnesses have a direct impact on the effectiveness of the entire system.

Related components from the headliner area

If you are planning a comprehensive repair or upgrade of the headliner area in your Mercedes and need other elements from the same group, such as pillar covers, mounting elements, or additional reinforcements, check the available parts in the Mercedes Headliner and parts category.

For drivers also interested in improving visibility and safety at night, a practical guide regarding lighting may be useful – detailed information can be found in the article See more and better – a complete guide to selecting and replacing used LED and Xenon headlights, which helps in consciously choosing original lighting components.